We really need pictures to tell anything. See the albums section, or other posts for examples of what we need to see. Right now it sounds like you have a early 1920s commercial. On the front of the frame is there a letter under the ser. no? See here, technical sections, markings for examples.
FN
Last edited by FNorm; 12-30-2009 at 04:49 PM.
Reason: add
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