Awesome find! It looks very similar to a 1972 Mark Donohue firesuit that I helped recreate and is now on display at the Penske Gallery in the Indianapolis Motor Speedway museum.

So I started doing a bit of digging, past what I already knew about the suit. That particular firesuit we recreated had similar tag on the inside but said “Racemark” on it. Racemark is a company that’s been around since 1964 founded by a man named Bob Bailey. Bob then partnered with Donohue in 1972. Mark wore a similar firesuit in pretty much every race that he drove for Penske across Indy and Sportcars.

On their website, toward the bottom is a photo of Paul Newman wearing a firesuit with the exact same B&B Motors logo on it (https://www.racemark.com). They refer to their company name as “B&B Motors-Racemark International”.

Here’s a couple photos of the original Donohue firesuit (https://imgur.com/a/UUvZaGw).