I picked up this 17" Zilco at an auction this past weekend for $22.50 cause I liked the sound. However, I don't know a thing about it... Can anyone tell me the vintage or what the stamp may mean??

[IMG]http://img254.imageshack.us/img254/5793/zilco1.jpg[/IMG]

[IMG]http://img534.imageshack.us/img534/6196/zilco2.jpg[/IMG]