Has anyone heard of Bull Shirts?

[CRAZYBUBBA]

I wasn't sure what section of the forum to put this in.

I saw a bull shirt at work a couple weeks ago, (see the one in the middle) and had assumed that it was a 70s "destination" tee.

http://s275.photobucket.com/albums/jj296/CRAZYBUBBA/Vintage%20Samples/?action=view&current=DSC00327.jpg

I was looking at Koshercollectibles today and saw that he also has one http://cgi.ebay.com/RARE-VINTAGE-1960s-60s-BULL-SHIRT-GRAPHIC-PRINT-TEE_W0QQitemZ180436186586QQcmdZViewItemQQptZVintage_Men_s_Clothing?hash=item2a02d5b5da but dates it to the 60s. Are these shirts special/notable for some reason?

Edit: On the Bull Shirt website it says that the company started in 1980. How confusing.

[hermosavtg]

I'd categorize this as a "vintage novelty tee" produced in several variations throughout the 70's and 80's:

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0176648988
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0166483974
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0176621119