I know it isn't but it could have been a tandem crank. did you think about that?
Looks like a regular 75 to me
@bibimbap started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I know it isn't but it could have been a tandem crank. did you think about that?