We have a complete but rough 1972 Schwinn Varsity Sierra Brown ser.#LH503591.
A nice find for parts or a rebuild. Price is firm.
Back tire does not hold air. Rough paint. This ride will need some TLC.
I believe the size to be •Model 126 26" frame Varsity. Parts on bike say Schwinn approved (seat, tires, and more...). Serial number is on front head tube.
Here is some info found on Schwinn's website.
Selected features and equipment usually found on bikes costing much more. Diamond style lightweight frame, Twin-Stick gear shift controls, 10-speed derailleur, 38 to 100 gear, 27" x 1 1/4" sports touring tires, drop handlebars, and dual position brake levers. Four frame sizes.
Colors; Kool Lemon, Sierra Brown and Campus green.