The mans tool

[Barrett]

It could be an very early model. I would have guessed 3/4 in drive.
This thing just might have some antique or historical value.

[Robert]

@Barrett

early model

Serial ends in A004 so I was guessing the same, I did reach out to the company Tim linked to see if they may care to make an offer but no response, and no worries, it will fit in somewhere once I’m done with the garage, and if I ever decide to build any B52’s I’ll have a good start