I just obtained a Hickok "Dynamic AC51" Tube Tester and am wanting to obtain Model Year data and Schematic information for it, please. Any tips, hints and other details would be helpful and appreciated!!! Thank you very much.

I did not see one at BAMA free manuals. There are some for sale, Google it. I won't advertise for anyone here.

These were made in the late thirties, probably '38 or '39....best to check the late great Alan Douglas's fine book, "Tube Testers and other classic test equipment" for more accurate dating if curious or old radio catalogs from that time...
Is your model a AC-51 or AC-51X?
I may be able to scan you a copy of the manual if you need it and possibly test data for tester as well.
Can you post a photo? (you may have to resize it smaller to fit)

1936 - schematic: http://stevenjohnson.com/hickok/data.htm

Thank you for the replies! This will definitely make life easier. I'll try to post a photo - it's a Dynamic AC-51 as I originally posted.

Finally around to posting some photos of my Hickok AC-51 Tube Tester! Still interested in any ‘advice’. Thank you.