Hot Rods Info Wanted! Bell Auto Bat Wings

I picked up these Bell Auto Batwings and cant seem to find any info on them. I ***ume these had matching hairpins. Does anyone have a catalog that shows these? Thanks in advace for the help!

 

Flame cut, TIG welded, and the address on the box has a 5 digit zip code. Can't be ancient, but maybe 70's? Can you read the date on the postage stamp?

 

Yeah, I figured that they were not super early, but still neat. I cant make out any of the dates on the box.

 

Still cool to have.

 

Bump, Would still be interested to see a catalog page for these if anyone has one.

 

I grew up in Bell and the store was still around in that era. I still remember the gl*** store front like it was just yesterday. The zip is correct by the way.

 

1970 was 48 years ago....ancient by some of our standards