Schwiin sting ray what year?

[Gold Street Customs]

Without a serial number I would guess late seventies by the fork and seat.

 

[MplsCoaster]

I saw that tonight too. Fork seems to be painted but a cast piece like stock (just built one)
Can't see if the chain ring is an original mag or not. I'd look closely for that price
Bought my badly painted and BMX converted Sting Ray for for $40 (mostly for the frame/fork/chainring). Guy that sold me mine said the chain guards were worth $35 alone (well maybe, or not). The chain guard on mine was super solid and ended up using in my build.
It looks in good condition and the seat looks kinda cool, handle bars look maybe taller than stock
Good Luck!

 

[ratina]

The bars look like 67 bars. And it has a full rear fender. It could be early 70s with a late 70s seat or vice versa