A while ago, someone was trying to find part numbers used for rear defog, fog lights etc switches. While looking for something else, I stumbled on my receipt when I bought them in 1972

switch 911.613.027.00

plastic nut 901.613.261.20

cap for symbol 901.552.827.00

fog light symbol 901.613.802.00

12v bulb

I hope this helps someone

Tom