13 1/4”’ | Hand Wind | Swiss Lever| Small Seconds | Chronograph |

Remarks:

• Column-wheel chronograph: central chronograph seconds, 30 min counter at 3H
• Button at 2H: Start/Stop, Button at 4H: Zero setting
• 304 is not an official caliber designation, but a military project number given by the Chinese governement to develop chronograph watches for pilots. Project 304 was launchend in 1961. It was managed by the Tianjin Watch Factory (later named Sea-Gull), which developed the ST3, based on the design of the Swiss Venus 175. The ST3 was modernized and became the ST19, which is still in productions today.
  In 1969 project 304 was transferred to the Fenglei Instruments Factory. It is unclear whether the ST3 movement was also manufactured there initially or whether work began immediately on developing the movement shown here, which resembles the Valjoux 23 more than the Venus 175.
• These movements can be found in watches of the brand ‘Captain’. Around the year 2000 a number of these watches came onto the market. It is not clear if a stock of old movements had been cased-up or if manufacturing had restarted.

• Listing ID: 19991
• Manufacturer / Brand: Fenglei
• Caliber: 304
• Size in French Lignes: 13 1/4'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Other Functions: Chronograph
• Jewels: 22
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Unknown
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: Unknown, probably 1970+
• Country: China
• Identification: See external link 2 below.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link 2: https://zhuanlan.zhihu.com/p/713026165