I have seen numbers like Brad's on a few Harmony instruments that from all features appear to be from the late 30's early 40's. The First half/Second half at least allows for a time period that could be feasible.
: I have a silvertone 1481 amp - how can I tell when it was manufactured? : Thanks, greg I think that number is a chassis number. They were purchased at the same time if that helps you any...you're looking at it being at least 42 years old... : : I have a silvertone 1481 amp - how can I tell when it was manufactured? : : Thanks, greg : I think that number is a chassis number. I just bought one and I am going though the same search.
From some recent information that was gleaned from a former Harmony employee that has changed somewhat.
The general thought (that I have posted here in the past) is that they were stamped with a letter that stood for the season the instrument was built (Summer, Winter, Fall) followed by the two digit year.By the end of the 1960s, the Silvertone brand name was only appearing on musical instruments and the top-of-the-line stereo equipment and televisions.Silvertone products last appeared in the spring 1972 catalog on televisions and stereo systems.There has also been a conventional wisdom that Harmony did not put serial numbers on their mandolins. A Harmony Model number is generally stamped as XXXHXX.It appears that the number after the H is the model number and the number prior is the serial of that batch, made in that time period.As with the Silvertone radio, Sears Silvertone guitars are considered prized pieces of many guitar collections, particularly models such as the 1963 "amp-in-case" guitar, which featured an amplifier built into the guitar's carrying case.