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Frame ID Tag Question

DornTRoriginal

Jedi Hopeful
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When I took the engine off the frame I found beneath all the grim and grease an interesting tag welded to the frame. So I am wondering: is this common on all british cars or in my case a 1959 TR3, what do other tags look like and is there any reference linking the tag to something! Does anyone know?
Frame Id Plate (email).JPG
 
Cool! I have a "sankey" manufactured frame! Thanks Tom!
Frame types were numbered however each individual frame did not have a unique number. The frame type tags were welded onto the top front major cross member piece. As previously indicated, approximately the first 1300 frames were manufactured in the Triumph factory and carried the designation “Z10 through possibly Z19”. The frames manufactured by Sankeys carried the designation “Z21 through possibly Z29”.It appears that after the split column steering was introduced, the frame designation may have changed again to “Z31”.
 
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