Citizen 150m 62-5370 & B52806


Citizen Diver OR-O B52806 or 62-5370 are, more or less, the same model. Both of them are difficult to find, no matter the condition, to find a NOS one… almost impossible. The 62-5370 is made for domestic market and the B52806 for export and has its own awesome engraved case back. So, they have different case backs, different hands sets and dial codes but they share some of these features sometimes (variants or marriage?). The second hand tip received a luminous ball for better visibility for the export model. The 62-5370 can be found with a simple second hand. The only obvious thing that is constantly different is the case back. The movement is Citizen cal. 5470 for 62-5370 and 5430 for B52806. I don’t see any other difference between these two calibres other than the swinging rotor.

citizen 62-5370 citizen B52806 (2)

I had to have both of them even though in the first place I got only the NOS export model (because of the beautiful case back).  Both of them are marked water proof 150 M in a period when the term Parawater was about to… unfortunately disappear. This water resistance is possible due to thick mineral crystal, screw in crown and case back. They ware made in ’69-’70 but the exact period is impossible to determine for the export model because it has no serial no. The 62-5370, on the other hand, has a serial engraved and the manufacturing date can easily be seen.

So… one model with variants or two distinct models? The debate might still be on but as far as I am concerned I will consider them variants of the same model and… have them both!

Read about the complete 150m Citizen diver collection HERE.

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Citizen Chrono Master 4-520840-Y and ACSS2929-Y


I am going to keep this simple. This is a picture with two similar watches. In fact it is the same model, Citizen Chrono Master Chronometer Auto Day Date 33 Jewels. It is a long name, but what a watch! The different aspect about these pieces is that one of them is marked 4-520840-Y and the other one is the ACSS2929-Y. Why? Because one is a few months older and the Citizen used ACSSxxxx and the newer version was renamed 4-xxxxxx. (thanks Stephen for the clarification) 

citizen chrono master chronometer auto day date

The case is exactly the same, entirely polished stainless steel, screw retained case back with the awesome gold eagle inlay medallion. The mineral crystal is slightly domed with a concave inner surface. The crown is signed “C”. The movement is the Citizen calibre automatic 5240 with 33 jewels, beating at 18,000 bph and can be hand winded too. In this case the watch is Chronometer grade but the case number is correct for day date version, Chronometer or not. The lug distance is 20mm and they came either with a mesh bracelet or with a leather strap.

One more difference on these two watches presented here is the dial code, even though they are exactly the same. The hands are the same and so is everything else.

Read more about the regular Chrono Master Auto Day Date (not Chronometer) HERE.

Citizen Crystate Deluxe 22 jewels


About a week ago Vladimir sent me his watch in order for me to review it and find more information on this rare bird. I can say that I was intrigued with a few aspects of this watch so I decided to dig into this and find some answer. Well guys, here it is the July 1968 Parawater Citizen Crystate Deluxe 22 Jewels!

citizen crystate deluxe

The entire watch is made of stainless steel and so is the bracelet. The 37mm case is entirely polished with simple and elegant surfaces. By contrast the bracelet finishing alternates between brushed and polished parts. Even though there is no brushed surface on the case, there is something similar, on the dial! Well, about the dial, that is a piece of art, simple, silver, with longitudinal brushed texture from 12 to 6, with applied hour markers. By the way, there is no date feature so the dial is well balanced. Regarding the polished hour markers, they also have a longitudinal black line except for the 12 o’clock one that has two. There is no luminous material to be found. The hands match the overall design and are simple, with a centrally mounted sweeping hand that hacks when the time is set (we will talk a little about the movement later). On the dial we can find the Citizen logo and a the star logo applied. The “Crystate Deluxe” and “22 jewels” are printed in black. The dial code and “Japan”, as well as the minute chapter ring, are also printed in black. I found a black dial version of the watch online and it seams it came in only two dial variants, silver and black. I like the silver one better.

The crystal is made of mineral glass and this fact on top of the upgraded metal bracelet gave the base model (the Citizen Homer) a new life into the form of the Crystate. It also has SS case, better regulated movement and screw in case back. The Deluxe and the star logo suggest a better finished movement. (thank you Kenneth for your help!) This one has 22 jewels because there is one additional one in addition of the regular 21, on the underneath part of the barrel.

The movement is rather common one (except for the additional jewel and better finishing) and hand winds. It also hacks for a better time setting. It runs at 18,000 bph.

Thank you Vladimir for lending me your watch, I took good care of it and I hope you enjoyed the review!

Read more about other simple Citizen watches HERE

Citizen Alarm Date Custom V2 Blackie


Without a doubt this is one of my all time favorite alarms! Sporty, great wrist presence, complicated, beautiful and useful! Here it is the NOS, black coated, 1971 Citizen Alarm Date Custom V2 blackie! (model  4-310179Y)

I wrote a few articles about Citizen alarms powered by this movement so the data is the same: a hand wound movement, calibre 3102 (date), 21 Jewels, 18,000 bph. The twin crowns are for time setting and winding the main spring and the other one for setting and winding the alarm. The crown at 2 o’clock in first position is winding the alarm while the alarm is deactivated. If you pull it in the second position you can set the alarm (counterclockwise) and the alarm is activated. Pressing it while the alarm is ringing will stop it. The crown at 4 will wind the watch and pulling it out will set the time. The alarm will ring for about 13-16 seconds.

citizen alarm date custom v2

The case is black coated and so is the bracelet. Read about another beautiful blackie V2 HERE. The three crowns, the bezel and the case back are made of stainless steel and are polished.

The dial is gorgeous, black, with applied luminous hour markers that are still glowing today. The date is located at 3 o clock, in a white frame, and is printed in white on a black date wheel. The second hand is orange and we have one more color, yellow, used for the inner bi directional rotating bezel. This bezel is operated by the third crown, the one located at 10 o’clock. You can use this feature for easily reading the elapsed time, up to 60 minutes, just as you do with your usual diver.

Read more about other alarms on the dedicated page HERE.

Citizen V2 Custom Blackie 4-720636TA


Citizen launched this interesting range in 1970 and also in 1970 they started experimenting black coating their watches. One of the interesting facts about this particular watch is the fact that is made in May 1970, being one of the first Blackies Citizen ever built.

citizen custom v2 day date blackie

The case, as well as the bracelet, is black coated aluminum alloy. The clasp is made of stainless steel and the folding part in not coated. The outer part of the clasp is coated too so the look of the entire watch is as black as it gets. Even the screw in case-back is black. The bezel is black, the dial and the crown, black too. The date and the day wheels are, you guessed it, black. 🙂 No wonder Citizen named this “Blackie”. The reason for coating their watches for Citizen was the same reason manufacturers are doing it today: it looks good and they try to find ways to protect the material underneath. Because this watch is made of a very light alloy, that is not really scratch resistant, the coating comes as a great addition.

The entire lettering is printed white, the numerals on the bidirectional rotating bezel are raised, and so are the luminous hour markers on the dial.  The Citizen logo and the V2 one are applied and polished. The hands are polished too except for the blue central second hand that has a luminous dot. Sundays are printed in red, while all the rest is white. Later versions of this watch have the day wheel white with black lettering and non coated case backs.

The movement inside is the Citizen automatic calibre 7280, 23 Jewels, running at 21,600 bph. It hacks (when setting the time the second hand stops). It is an automatic movement, but as most Citizen calibres, this one hand winds too. The date is a quick set (in the second crown position) and the day changes by advancing the hour hand past midnight.

Bottom line, this is a beautiful, interesting, lovely to wear and look at… BLACK marvel. 🙂 It somehow reminds me of the white chalk writing on the school table. Awesome watch!

Read about the Citizen Alarm Date Custom V2 Blackie HERE