Baldwin L Serial Number

[Farrell]

This same Baldwin L with the "magic pitch drop" notes. I had never found a serial number on it, and just by chance while crawling under it today I noticed a small ink-stamped number on the soundboard side of the bellyrail: "K 49123". Looked that up in Pierce and it suggests 1925. I guessed the piano to be from the 1920s, owner thought it might be more like 40s or 50s.

Obvious question: Is this the serial number? Baldwin ever put serial numbers on bellyrails (its not in the normal place on plate - but some clown has already painted plate, and pins, and agraffes, and strings......)? And if so, what does the "K" indicate? Thanks.

Terry Farrell