Hello
I put this question in the Chat section and just realised this might be more visible so repeated below
I was sold these pistons years ago as suitable for a Spitfire 1500. I didn't need them at the time but have since discovered they are not for a Spit 1500.
They are Sheepbridge Engineering Precision Pistons. The label reads Reference: SA193, Make: Standard, Size: 2.90 +020.
As you will see in the photo the word Triumph has been written on the box in ink.
Would appreciate any assistance in identifying which engine these are for.
Thanks
Phil