Sako Optilock Scope Base for Tikka T3X

[Sartori42]

Hello,

I have a Tikka T3X Varmint on order and I'm getting my scope plans together. Despite the high cost, I'm planning to mount the scope using the Optilock base and rings. My problem is that I don't know which base to order. The Beretta website shows the correct (blued) base as part number S13269738. But I found a document on the Sako website showing the correct part number as S1320916. I have found both part numbers for sale at various sites. Does anyone know which one is correct?

Thank you.

Steven