All About Pocket Knives

I picked this beauty up at a gun show in Houston last weekend. I'm trying to figure out who the maker is. The mark looks a stylized letter B. Handle material is MOB and abalone. Action is very smooth both opening and closing. Any info will be greatly appreciated.

Hazarding a guess but it looks like it could be one made by Hugh Bartrug who used to make high end folders in St. Petersburg Florida.I think he is retired now.Beautiful looking knife.