The Jet movement is a ring rotor one that I really like a lot. Rumor has it that Citizen chose to replace this movement with a central swing rotor, even though the rotor one was better, because the later one was cheaper to produce.  This one is a 21 jewels movement, beating at 18,000 bph. It has a power reserve at about 45 hours. The movement, as stated , is an automatic but can be manually winded too. I came to the conclusion that the rotating ring has 4 or 6 screws but the 4 screws one seems to be a more rare earlier type. The thing I like the most it the beautiful sound that the rotor is making when rotating, smooth, loud, mechanic.

Enjoy the photos taken by Sergio.

Citizen 1160

Features: Automatic, Sweep second, Date: quickset by repeated pulling the crown

Data
13”’, Dm= 29.0mm. Do= 29.4mm
H= 5.3mm
(visible automatic wheel +0.1mm)
F= 1.45mm
T= 2.25mm
39 jewels
f = 18000 A/h
power reserve 47h

Balance staff U3163

Stem W3088

Hands
1.52 x 1.00 x 0.18mm

Remarks
1963-
ring rotor rotating on 9 ruby balls
nearly useless jewels in the three rotor suspension plates
differences not known between 1160, 1161

family/generations:
0310: 21/23/25 jewels
0320, 0321: 17/19 jewels
0340, 0341: 35 jewels
1120, 1121: 19/21/23/27/35 jewels, date
1130, 1131…1133: 17/19 jewels, date
1150: 39 jewels, date
1160, 1161: 39 jewels, quickset date
1170: 27 jewels, quickset date
redesign, all with quickset date:
4000…4002: manual wind, 23 jewels, day, date
4101…4103: 25 jewels, day, date
4111…4113: 19 jewels, day, date
4111…4113: 19 jewels, day, date, month
4130: 35 jewels, day, date

Example, year: signature; shock device
1965: Citizen Jet, Autodater; Parashock
(Citizen 4130 without day disc)

Data from here. 

Read about the Newmaster watch powered by this movement here:

https://vintagecitizenwatches.com/2014/07/20/vintage-citizen-newmaster-autodater/