Thanks Rad29 I will be talking to him this evening and I will find out all the details I can and he will be sending pictures of it. So if it is a 1956 it would be a 5 screw? When did the 4 screw production start and what is the difference besides the amount of the screws?
Thank you all for your help. I will ask about the serial number also, he said it started with an "S"

p.s. He is holding it until we talk and I see pictures.

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Craig