I inherited these Valve Springs from my father who used to be involved with these engines in the

late 50's and 60's.  It is not an engine I am really familiar with so my 

apologies for any errors I have made.

Although not 100% sure I think these Springs are for the 1500cc and the 2000cc engine.

The Double Valve Springs look new and I had coated them with oil many years ago.

There was a Label with them that said,

'2 SETS ST1 / FPF VALVE SPRINGS'

The Outer Diameter Spring has an O/D of 1.300", I/D of 0.935" and length of 2.07".

The Inner Diameter Spring has an O/D of 0.9225", I/D of 0.660" and length of 1.83".

The Outer Spring Coil Diameter is 0.185".

The Inner Spring Coil Diameter is 0.135".

With the Springs compressed to a length of 1.73" they all measured 100 lbsins +/- 2.5%.

This would equate to a Spring Rating of approx 295lbsins.