Hey all, I was given a pack of old Bosch spark plugs that I haven't been able to find a ton of info on.
The number is W230T30 and they look like 14mm x 3/4" that would fit in the 914 but not sure about heat range or anything like that.
Anyone seen these before?

Even if I can't use them they are pretty neat, haven't seen spark plugs wrapped in wax paper before so that may tell you how old they are? And how young I am maybe?

Closest I see are W 225 T 30 which is W5D in my 1980 Bosch chart.
Standard fit for Alfa 1300 -1600- 1750 GTV, Spider Duetto and Spider Veloce.
Also fit for various Ferraris.
For this site....2.0 911, 2.0 911T, 2.2 911 T, 2.4 911(carbed euro cars) and 2.7 911s
in 1975-77
W 230 T 30 ? not listed....