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WWII era case parts for cal 420 series watches [message #8687] Fri, 05 January 2018 03:16
JackW is currently offline  JackW
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Registered: May 2013
Location: Denver
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I picked up a nice dial with a movement recently, that likely originated from a low-serial Swiss case. The movement is a 421ss with serial #789134. Among the lowest 420/421ss serial I've seen to date. No case though....

So I have these two parts. It is the same story that the threads on the case back do not mesh with the bezel.


Case back has the serial 52623 and has "Guildite Back" on the inside but is not recessed for the sweeps seconds. This is likely for a chrome-plated case because of the word "back" that housed a subseconds 420/421.

The bezel I have is a stainless steel bezel for the 420 or 420ss cal. A case back from another Gruen 420ss cal watch with serial 1068426 fits the threads. Considering the serial number on the movement, the case likely had the 'million' serial case or a swiss case with a 49xxx serial.

I'm looking to trade my case back (non-recessed) for a case back (with the SS recess) in those above serials.

I'll re-reimburse you for the postage too.

...or if you have one that will fit for sale.


All I know is based on hard work & writing by others. I can only aspire to augment this body of knowledge. If I am wrong it is because of my own failings. -me

"If I have seen farther it is by standing on the shoulders of giants." - Newton

[Updated on: Fri, 05 January 2018 05:57]

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