Before we go any further, just to Clarify firstly...Do you have a broken or unusable sample you can post an image of, Or do you not have one at all?

Sheerline Magneto should be The same as the Second generation ( Models 2a 3 4 and 5 magneto) as far as Im aware, just a different manufacturer. Early Model 5 fly has "Certzinc 275" marked on the inner. The sheerline has no Makers mark and 2 red paint swabs. Ive checked 3 model 5 and 3 sheerline and I cant see any real differences, except slight cosmetic variations.. Both 10 fin Victa Stamped and keyways and poles are in identical positions. The First generation Sheerline 125 is virtually the same engine as the Model 5 from memory with the only exception being the top crankcase half.







An indication of location would be handy Lesley, as someone local to you may be of more assistance.

[Linked Image]