From my collection, I offer you this beautiful and rare model 950, 23 jewel watch in a nice Keystone "J. Boss" Mainliner 14K White Gold-Filled Case Movement: The 16 sizes, lever set configuration, with 23 Ruby & Sapphire jewels in gold settings, is adjusted for 5 positions and features a motor barrel and gold train. It is marked 950, Hamilton Watch Co. Lancaster, Pa. It runs well with strong motion, keeping good time. The serial number on the movement is 1576248 which dates the watch to about 1921. The last service date was 05/02/2023. The Run Quantity on this model is 1000 only. Case: The movement is housed in a Keystone "J. Boss" Mainliner 14K White Gold-Filled Case. There are no dents pocket faint scratches and a few pinhead nicks around the edge and case body. The back has no initials or dedications. The White gold fill looks great with a nice pattern on the case back. Case S/N. 7834264. Showing a little patina on top of the neck and the bow from normal use. Dial: The dial is a very nice double-sunk Formal Monty-style dial with large Arabic hour numerals surrounded by minute markings and red 5-minute Arabic numerals. No hairlines, no cracks, only showing bezel rub around the outer edge. Hands and Crystal: The dial is complimented with a set of Cobalt Blue spade and whip-style hands and a NOS crystal. Both the hands and crystal are in excellent condition. Excellent Crown and bow, the bow is moveable. Both cover screws on/off nicely with a tight seal This is a beautiful piece to add to your collection! Don't pass it up. (Please review all close-up vivid photos for your approval as they are part of the description) Hamilton Watch Co. Grade: 950 Manufacturer:Hamilton Manufacturer Location:Lancaster, Pennsylvania Movement Serial Number:1576248 Grade:950 Model:3 Estimated Production Year:1921 Run Quantity:1,000 Grade/Model Run:19 of 28 Grade/Model Total Production:22,300 Size:16s Jewels:23j Jewel Material:Ruby & Sapphire Jewel Setting:Gold Settings (Screw-Set) Movement Configuration:Openface Movement Finish:Nickel Movement Setting:Lever Plate:Bridge Plate Bridge Type:Center Barrel:Patent Motor Train Material:Gold Center Wheel Material:Gold Regulator:Reed Hairspring:Breguet Pallet Jewel Material:Sapphire Standard Dial Type:Double-Sunk Adjusted:Yes Adjusted to Position:Yes Adjusted # of Positions:5 Adjusted to Temperature:Yes Adjusted to Isochronism:Yes Railroad Grade:Yes Dial Feet Locations:22.3, 38.0, 57.1 Hamilton 16s Dial Feet Research Data Research:1953 Hamilton Serial List Case:Various
