SEIKO Precision Cal.91RW

[anilv]

Hi guys...

Just sharing my latest acquisition... a Seiko 'Precision 'pocket watch with 'second setting'. The movement is a cal 91RW (railway watch).

The 'second-setting' is a form of hacking where you pull the crown and the seconds hand will stop when it reaches '0'. You wait for the time signal (over the radio?) and press it in at the hourly beep. Apparently there is a pin on the 4th wheel which the hack lever contacts in the time setting position.

The movement is simple and quite clean for its age.

Crown Is marked 'S'.. case is played base-metal.

Case has seven digits , Seiko went to 6 digits in the mid sixties but the dating system where the first digit indicates the year of manufacture and the second digit the month still applies. Considering that this movement was first made in 1945, this watch could've been made in 1945, 1955 or 1965.. I'm thinking 1965 but who knows for sure?!

Anyway the watch runs well but surprisingly has a very loud 'tick' which can be heard across my bedroom. The only watches which have done this before are pin-levers!

Anil

 

[jdm]

On 11/3/2016 at 1:12 PM, anilv said:

 

Case has seven digits , Seiko went to 6 digits in the mid sixties but the dating system where the first digit indicates the year of manufacture and the second digit the month still applies. Considering that this movement was first made in 1945, this watch could've been made in 1945, 1955 or 1965.. I'm thinking 1965 but who knows for sure?!

I would think so. I believe Diaflex (unbreakable mainspring) is a invention of the 60s. But  anti-shock was available then, but is not used in your watch.

[ramrod]

very nice! i never knew the extent of seiko's foray into the pocketwatch world. they are worth perusing on ebay.