Look like BMX style, https://www.google.com/search?sxsrf=ALeKk02SDYOYoPWuYUsB-NaHJ8vO6smhFw:1606423546097&q=how+to+install+bmx+chain+tensioner&sa=X&ved=2ahUKEwiZosuGiqHtAhWMzVkKHYhkDQYQ1QIoAXoECAQQAg&biw=1280&bih=577#kpvalbx=_LhXAX7CYO9SawbkP4_m24Ao8
Picked this up a few days ago, Had 27 inch lightweight rims on it and crank. removed those and cleaned it off a bit. Any ideas on the year or value as is.
Some 1953 #`s are the same as 1957#`s Example #`s for 9/26/1953 B17901-B20750 Next 1/14/1957 B18549-B22094. Middleweight Schwinn`s did not come out till 1955.