Wista sliding back identification please

[Nas]

Please can someone tell me which model of Wista camera this 6x 9 sliding back fits onto. Thanks.

 

[HowLarge]

That will be the SP and VX plus any that have the two oblong clips on the top body , they engage with the two notches on your back
Butkus has Wista manuals that show them.
I have one of those backs along with the specific 6x9 roll film back that fits the slider - note it’s not grafloc there is no long notch like a film holder to register.
It’s a clever system as a dark slide is incorporated in the sliding system so once you pull the holder ds the sliding mechanism keeps you safe until you remove the film holder .
A very specific thing just for those cameras

 

[Nas]

That will be the SP and VX plus any that have the two oblong clips on the top body , they engage with the two notches on your back
Butkus has Wista manuals that show them.
I have one of those backs along with the specific 6x9 roll film back that fits the slider - note it’s not grafloc there is no long notch like a film holder to register.
It’s a clever system as a dark slide is incorporated in the sliding system so once you pull the holder ds the sliding mechanism keeps you safe until you remove the film holder .
A very specific thing just for those cameras

Many thanks. I have Horseman roll holders as you describe which will go on this but I use those on a similar back to this which is Graflok and useable on a range of my cameras. This one came in an auction lot with other bits I wanted but I didn't know what to list this as compatible with.