How can I find out the Birthday of a Auto-Ordnance 1911???

I just picked up a new to me Auto-Ordnance 1911 and I'm trying to find out when it was built...

Is there someone I can contact or somewhere I can look up the serial number to find out it's build date???

Or do I have to contact Kahr in Worcester???

Thanks in advance for the help...

David

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I'd probably try the contact on the Auto Ordnance website first. Kahr could no doubt tell but Auto Ordnance might be more direct.