My good friend David gave me this Elgin 16S Grade 312 Pocket Watch for a service and a bit of TLC. It was manufactured by Elgin which was an American company based in Illinois. I was able to date the production to 1921 from the serial number. This would have been a very good quality watch (and expensive at the time). The case is 9 carat solid gold.
This Waltham pocket watch required a service and crystal replacement. It was running, but not very well at all, timekeeping was out by several minutes a day and the balance wheel had very poor amplitude.
It was approximately 81 years old at the time of writing: Production dated year 1936, according to the Waltham “Gray Book” List.
The watch is in very good condition given its age. It is cased in a gold filled case by British maker Dennison. This particular case is made of a base metal sandwiched between two plates of 0.036mm thick 9 carat gold. It is their “star” grade which at the time was guaranteed for 10 years. The quality of the plating by Dennison has stood the test of time as it is still in good condition, with very little base metal visible.