Advise on correct adapter ring for 1570 to 2836-2

[denimhead]

ADAPTER RING FOR 1570 SPEC CASE TO ETA 2836-2

For the life of me i can't remember what adapter ring i need! having handled loads over the years. I guess its an age thing

Can anyone confirm the depth i need, i think I'm right in saying its 29.2 in diameter?

Appreciate the help

Cheers DH 

[rolojack]

I have some for sale if you need..... I had them made in brass to fit ETAs in gen specs case like the 1680 case I last used...