Noel
P.S. Jay
Thanks again for help with the Ru suitcase enlarger issue, I opened the suitcase case and removed every thing and vacuumed cleaned the foam, this removed every thing but the sticky foam residue. Then I washed everything to remove residue. I discovered the foam was eating the paint and the instruction book. I used a dyson which, would have stripped intact foam...
The book says any 60watt (or less) ES screw bulb will do, even a clear glass! It says with clear glass one needs to use the 6x6 cm ground glass option placing it in the filter drawer. I bought the enlarger from new about '73, so have all parts including sticky foam, half frame and 16mm masks.
Yes it has a plastic lamp housing but it is not totally heat resistant! The book says only use the bulb while focusing or printing... My serial number was 31xx so it may not have been high volume.
Do you have a booklet with your enlarger? If not it may be able to scan but could certaintly photo copy and snail mail.