Very interesting, didn't know there was a MkIII version! Israel also changed heater resistor values from .22uf to .33uf in latest versions of Statement. This change made to insure greater reliability, life from the few quality 101D tubes available today. Present production 101D tubes are somewhat fragile, this should help.
For those with Statement really only two present production 101D top notch, those being Psvane WE and Linalai Elite Solid plate, the mesh plate version had some mid range glare in my setup. All other present production 101D not in same league with transparency, resolution. I may try NOS Western Electric at some point, one needs adapter for these, original 101 used four short equal size pins, new 101 longer pins and two larger diameter.