Just thought this was interesting. A 952 that I just got in hand came with the tin the movement was being stored in. Under the sticker was the following etched into the top by hand on etched lines. #6 18s 925 SER #606801 PLATE DEPT 5-23-08 PRODUCT 9-28-08 SOLD 10-31-08 FULL PLATE MOVT 17 JEWELS DONATED BY SERVICE OFFICE 10-19-32 FREY I did locate the ledger entry for this watch. https://nawcc.org/images/stories/Hamilton/LedgerPages/600001-700000/606801-606851A.pdf So at some point the watch made its way back to the factory. What I find interesting is the timeline. Plate Dept 5-23-08 then Product 9-28-08 Finished (ledger) 9-29-08 Sold 10-31-08. I guess it comes down to what the PLATE department was. Them taking finished plates from the dept and between 5-23 and 9-28 they assembled and timed it? So just a little over 4 months from plates to ready to go.