Aston Martin DB5 and DB6 twin brake & clutch fluid reservoir A.M.L. part no 48.33.190. 
This has the correct size inner vessle allowing the Sovy fluid level cap to fit straight onto Reservoir. 
See images, Sovy cap used only for display purpose only '' 
Some storage marks present.

****************The SOVY fluid level warning cap SOLD SEPERATLEY  '' SEE OTHER LISTING'S IF WISH TO PURCHASE**************