Raleigh Record

[bugflap]

I have a beloved Raleigh Record I bought with my first paycheck in 1975. Now I have retired and as I broke out my old Record, I discovered one of the three shoulder bolts holding the crank to the front chain wheel is missing. I pulled it's mate and it appears to be 26tpi. Any wizards here know what kind of threading was in use in those ancient days? Thanks for reading.

 

[Cycleops]

eBay is your friend when it comes to stuff like this.
There's bound to be some for yours on there somewhere.

to CC

 

[Paulus]

I have a beloved Raleigh Record I bought with my first paycheck in 1975. Now I have retired and as I broke out my old Record, I discovered one of the three shoulder bolts holding the crank to the front chain wheel is missing. I pulled it's mate and it appears to be 26tpi. Any wizards here know what kind of threading was in use in those ancient days? Thanks for reading.

Any chance of a photograph of the chain wheel to give us a clue as to what it could be?