Originally Posted by chug:
Your 1st and 3rd photos are of Ives #109 double-armed semaphores made between 1912-1922, although exactly dating these is difficult because of quite a few variations. I have included a picture of the one that I own with a stamped steel base.
Eric Hofberg
TCA, LCCA
Eric, thank you. Actually, my Ives semaphore (photo #1) I know to be a #302 Ives: see the attached scan of my dad's original 1923 Ives catalog; this is confirmed by Greenberg. The same listing and number appears in the 1926 catalog.
click to enlarge to read:
Now that I know what to look for, I was able to find the Ives #109 semaphore with the stepped base pictured in Greenberg. Thanks! As you say, it is an earlier version. Puzzle solved!