Ford pickup experts- what year??

I have a tailgate for a Ford pickup and I'd like to know what years it is from. Thanks.

 

'38-'40, I believe...

https://www.mackhils.com/mack_products/cart/index.asp?CategoryNo=20

 

Nice! I sold a very rusty one this summer for $100.00. The guy was going to cut it down to fit a late 20's box.

 

Yep 38-40, You looking to sell it?

 

Will also fit 41 but 41 just had the ford script with no v8