Earlier tonight I won the auction for the movement as per the following link: Waltham 18 Size Model 1883 Grade 15 Hunting “FROSTED” PW Movement. 195R | eBay The movement was advertised as a Waltham Model 1883 of Grade 15 having 17 jewels. Indeed one can see from the photos that it has 17j, in as much as the top center wheel jewel setting & one of its screws, can be seen "peeking" out from under the cock near the hairspring attachment in some of the listing photos. As per the PWDB site this movement is a Grade 15 of 17j: Waltham Pocket Watch Information: Serial Number 5371186 (Grade No. 15) Here's where I get confused. When I input the serial number 5371186 into the NAWCC search engine, I'm advised that the movement is a Grade 15 having 15j rather than 17j. But in the Comment field there is an entry based on the factory ledger namely "Breg LS Unadj Htg a few PSB + #25 17 jewel". So I understand that my movement was up-jewelled from 15 to 17 for some reason. That's clearly evident from the listing photos. But is it now an unsigned PS Bartlett grade, or is it a Grade 25, as per the note in the Comment field? Or is it just an up-jewelled Grade 15?