I'll see later what that number is.
On some of these machines the voltage for those bulbs is over 30 volts and resistors get pretty warm even using higher wattage ones. Maybe this was the reason for the diodes?
I suspect he had a good reason for them-he's done some pretty amazing electronic projects for me in the past-workarounds to solve electronic problems on these machines due to lack of old parts.
I do have the scariest for this machine if you'd like to take a look at them.
How's Westlake these days?
I spent many years in Lake Charles.