Correct Reverb Tank for 210-75

I just picked a 210 75 combo (Chassis 2275-75) and the original reverb tank is missing. Does anyone know which tank was originally specified?
I tried a 8BB2A1B which is the same tank as used in the RD100-112 and RD50-110, and it works pretty good, but not great.
thanks in advance!

The only one that I have listed is the one in my list for "Music Man" of the accutonics chart that I had from SOMEWHERE. It lists a 4FB3D1B. Don't know if it's right though. The tank that came out of my 130 head is a 4FB3A1B. It looks like MM used a much higher impedance input than a lot of the Fender style tanks, that may be the difference. Your input impedance of THAT tank is lower than what your amp wants to see. Mike.

thanks Mike, the only thing that makes me nervous is that tank has insulated in/outputs. Will this matter if I know the 8bb2a1b works and has grounded in/outputs? in other words -will the insulated vs grounding matter?
thanks again . . .

Should make any difference, I don't think.