probably a Nanao MS29-32 - is the CRT curved or flat ? what colour PCB is the monitor chassis ?
Toshiba is usually just the tube manufacturer, unless of course you have a tri sync Toshiba
Sanwa didn't use Toshiba tubes - at least not to my knowledge
just to clarify, my dual Nanao MS29SU tube is Toshiba, and I am sure my Tri Sync Nanao MS29-31 is Toshiba, aswell as my 31k only Nanao MS29-32, but i'd have to remove the back to confirm
also Toshiba tubes/chassis found in Konami Windy 1/2
It's a 31k only curved tube. The PCB is light light brown(pale?)ish, and has headers which connect "natively" to the JVS stuff in the naomi cab. (For adjustment switches and deguass, etc)
The chassis has no metal plates, but two "bars" that run in parallel over the back of the tube. (With this white plastic thing over them, to protect the components)