Early Gibsonette Self-Split Voltages Question

[K Teacher]

Greetings,
I am interested in the early Gibsonette model (circa 1952), self-split tube amp.
I have been searching the internet for information on this amp model, but had very little success.
Some voltages annotated on the available schematics, do not conform to Ohm's law, in particular the voltage drop across the speaker field-coil, which doubles as choke. I believe that initial production did not use Jensen's.

For these reasons, I redrew the schematic and I added notes from the information I pieced together from forums, YouTube videos, etc… and calculations using tube manuals datasheets (see attachments).

I calculated a re-calculated the 6SJ7 voltages but, they do not get close to the published values with a screen grid resistor of 1Meg ohm (critical value); it has to be 1.2Meg ohm. Since the amp uses 20% resistors, it is possible that the resistor marked 1Meg ohm, actually measures close to 1.2Meg ohm (needs confirmation).

The questions:
   If you have access to an early Gibsonette self-split in good working condition or have one on the bench, could you please write down the voltage figures, so I can check to see if what I got is correct? Please, include mains and filament voltages.
   Also, if is not too much to ask, could you measure the field coil speaker resistance? I believe it is around 850 ohms not 1000 ohms.
   And the output transformer winding ratio? I estimate the OT plate-to-plate impedance to be between 10k to 15k, but it needs to be confirmed. This OT should be similar to the Gibson BR-9 amp.
   Please, include any other information about the early Gibsonette self-split you think might be important; for example: which filament pin (2 or 7) is grounded, power resistors, speaker and/or transformers identification number, etc.

Thanks in advance for your help.

Attachments:
VOLTAGES TABLE
TUBE   POSIT.   Pin-1   Pin-2   Pin-3   Pin-4   Pin-5   Pin-6   Pin-7   Pin-8   B+
6SJ7   V1      filam.   0.9   0   0.9   34   filam.   81   241
6V6   V2      filam.   278   283   0      filam.   17.0   283
6V6   V3      filam.   278   283   0      filam.   17.0   283
5Y3   V4      349      330vac      330vac      349   

EARLY GIBSON GIBSONETTE SELF-SPLIT SCHEMATIC (CIRCA 1952)