Hi
@genesmachines
Thanks for publishing details, now added to the list.
Serial A118457, C7, is as you say, a1936 bike, the framewas built in July 36, and the bike built up soon after. The Morrow hub is nice, F3 is Quarter 3 1936, so it's almost certainly the original for this bike.
A118585, C7 is the closest survivor Ihave recorded.
https://thecabe.com/forum/threads/1930s-no-frills-westfield-elgin-motobike.147430/#post-994123
M78528 from mid 1934 is the only othe Columbus I have recorded, also a Women's bike.
https://thecabe.com/forum/threads/need-help-columbia-ladies-bike-dating.167741/
My first advice for working on the tyres, is to take the wheels off on a nice sunny day, and leave them out in the sun to get hot,hotter the better, because they will be flexible.
If they are tubed tyres, and the tubes are OK, inflate gently not hard, but enough for the tubes to form the tyre back to shape. Otherwise remove the tyres carefully from the rims, replace the tubes with new ones, clean the interior of the tyres, and remount them, then inflate gently as above.
Once you have a decent shape, take them somewhere cooler, and put the wheels back on the bike, with the bike upside down to allow the tyres to cool in the new shape. Once fully cool (next day?), you should be able to inflate a little harder, but watch out for cracking.
Best Regards,
Adrian