All about Gruen

[Fred]

By the result, I’d say many were convinced it’s authentic CPR. Unless this has been in CPR service before 1902, I see no way that it can be all original. I had reached out earlier today, got permission to share the seller pics here. Got some more info on these watches, which might be of interest.

[Fred]

Another recent auction with curious case mark...

Quadron 93. 123-102. “A” stamped after case #2,109,772. Cal 123, early split winding bridge, 2tone, with no adj (nor "unadjusted") marks; 694896 sn.

https://www.ebay.com/itm/126358299855

Having owned multiple Quad 93s w nearby cases, I think “A” here triggered “Applied gold numerals” variant—special order. I have seen gold-embossed “line” dial ones; neither they nor the more-common radium dial variants have yet to show an “A” case stamp.

Btw, appears to be a solid run of at least 1,500 cases—possibly 2,000.

[Mr. Bieser]

Interesting, for sure an uncommon mark. Thanks for sharing!

Yeah, with the Madretsch movement, I was impressed that the bids just kept coming, crazy.

[Fred]

351 = Revor, Walter Brusa. La Chaux-de-Fonds. 21.07.1934.
Also 3 digit model number 905 on tag matches inside caseback.
https://www.ebay.com/itm/164174516712

Regale 905, in play by 1956, is a match imo. Not sure about the ring links on the live example. Good to know it's a cal 275.

lastampa_1956-12-19 DETAIL.jpg (26.38 KiB) Viewed 9 times