[COLOR="Navy"]Jim:

It's my pleasure, but still - thank you for saying thank you.

The black & brass Chicago badge with no S-loop begins in 1959, the 3-point arm profile with screw attachment begins in 1958 and changes to rivet in 1961, the plastic heads begin in 1959 - so 1959 or 1960. Slingerland made a few more of these in 1960 than 1959, and I like the hoop ear shape as ones appearing frequently in 1960. But - while I think 1960 is a bit more likely - absolutely could be latter part of 1959.

DrCJW[/COLOR]