Ok, Entex Baseball 3 is working in MESS. I'll update the notes if you worked out how to measure its osc freq.
I connected the cap and resistors from BB3 to 4 other TMS1100s - two were B-revision dies and two were E-revision. Interestingly, the Es are faster than the Bs- B amateur = 169K, B pro = 218K, E amateur = 188K, E pro = 244K. The original chip was a B, so I guess 169K/218K is the way to go.