Spring Set Aeration Shocks (White)

[Betas]

Last year i bought a used racing car, a TRF502X.
I have now bought the new BigBore shocks.
The old Small Bore Aeration Shocks will be used on one of my vintage cars.
BigBore shocks are not allowed in vintage racing.
I really like these Tamiya shocks and i will buy a few more sets ( #42198 ).

Now for my question: Spring Set för the Small Bore Aeration shocks?
When I bought the car I got a some white springs with a small coulor mark.
Does anyone know the partno of those springs? Could it be the Spring Set #49431 ??
Also, which coulor is the hardest/softest?

Sorry for my bad english!
Best regards / Bert