Hi Jarmo,
-the pots have 72 build serial: 137(cts code) + 72 (year code)
-replacement tuners are grover milk bottle style; ca. 50€ with Thomann.de
-same with my, gray plastic wire was a nex thing in 72/73
-bridge looks correct to me, maybe some trussrod adjustment is needed to lower the action / or refretting
kind regards,j.