Your Lord Elgin watch with 21 jewels, serial number 811825, case number X106363, and a 14k gold-filled case marked "Elgin-U.S.A." is a vintage timepiece from the Elgin National Watch Company.
Lord Elgin was a premium line of wristwatches produced by Elgin.
The 21-jewel movement indicates a high-grade mechanical movement.
The 14k gold-filled case, made by Schwab and Wuischard of New York is not solid gold but has a thick layer of 14k gold bonded to a base metal. The base metal for this period was typically brass.
While the exact serial number 811825 isn’t listed in available records, similar Lord Elgin watches with serial numbers from the 1950s (e.g., those starting with letters like U or J) are dated to 1951–1955. Lord Elgin with a 21-jewel calibre 670 movement and a serial number in this range is likely from 1951–1952.
The "Elgin-U.S.A." marking confirms it was made before Elgin shifted some production to Switzerland in the late 1950s, making this an American-made watch, a point of pride for collectors due to Elgin’s heritage.
A well-preserved, serviced watch with an intact gold-filled case and original dial can fetch $400–$1,500.
The serial number (811825) and case number (X106363) are unique identifiers but don’t directly affect value unless they indicate a rare model or limited production run. Collectors value watches with documented provenance (e.g., original box or papers), which can increase worth by 10–20%.
Your watch’s 14k gold-filled case suggests it’s more affordable than solid gold models but still desirable for its vintage appeal and American craftsmanship.
Avoid polishing the case, as it can wear down the gold layer. If replacing the band, opt for a leather strap (e.g., 18mm brown alligator grain, as seen in similar models) to maintain vintage aesthetics.
This Lord Elgin is a beautiful piece of American horological history, likely a stylish dress watch from the early 1950s, perfect for collectors or as a cherished keepsake.
The "F.S." marking near the regulator suggests fine adjustment capabilities, typical of Lord Elgin’s precision engineering. The rectangular movement plate indicates a rectangular case design, which was popular in the 1940s–1950s for dress watches.
I hope this gives you what you need on this 'prized' vintage American made watch.
bdGreen