Currently working and ticking strongly, was tested over a 20 hour period and lost approx 20 to 30 seconds. It will need a service to keep perfect time. 1923 Illinois, Grade Bunn Special, Model 9, 21J, 16S, lever set, stem wind, 6 adjusts, double roller, railroad grade with date serial number 4374270. The 10k gold filled case is 49.8mm in diameter. Dial has a few tiny cracks, nice case with only minor wear, the bow has a lot of plate loss.