Columbia BN Turntable Questions

[columbia1spring]

I have this Columbia BN and have a question about the turn table. I see just by the speed control that it is not an early
model. It has the slide speed control as opposed to the plunger style. I bought it assuming it had the wrong turntable and now i'm not that sure.
It has a 10 inch on it and assumed it needed a 12 inch. An internet search shows them with both 10 and 12, but im not sure if thats 100% accurate.
I took pictures showing the underside of the turn table.
What do you think?

If this is wrong, what would a correct turntable look like?

[downsouth]

The five BNs that I have owned of which I still have two of them all had 10" turntables. Hope this helps. Wes

[Remmotors]

The late Columbia BN I used to own had the same on/off an 10" turntable as the machine in your pictures.
Roy

[columbia1spring]

It does seem to be the case that a 10 inch turn table is the norm.
Thank you for your imput.