Andersok
Posted January 9, 2019 - 12:40pm
Ads shows this case design with 30 jewels in the Commander line, and also with the Time Center 'B' (band specific), and then later in the Sea King line.
I would say that the dial markers match the Commander 'AO', but the print and lume have been removed. Dial otherwise looks to be original. Unless this one started life with the Time Center band, then Commander 'AO' would be accurate. Ads call for a silvertone dial, which this has.
I also think the case number has been removed from the inside back. If it is not etched there, then we would most likely see it ink stamped, especially with a thin metal back like this. The etching there now looks to be from a watchmaker's servicing.