miamibeachcg

I found a Marantz 4270 stereo at a local thrift store for only $29.95 last week & had put it on FB marketplace for $750obo. A guy came by my yard sale I was having yesterday & when he saw my vintage road bikes he told me he collected Schwinn Stingrays, Then when he saw the Marantz he offered me $500 for the stereo - or a 1974 Schwinn 5 speed stingray.
I took the Stingray!
To be sure I checked the serial number (MK51114) which makes it a Dec. 1974 stingray, right? But after he left I was checking other bikes and 1 thing I noticed is that almost all of them have the straight chrome legs on the back of the banana seat & mine has shock absorbers? The ones with these were krate stingrays (pes picker, etc..) - are these on my bike legit?
Also, the seat is a Person made in usa, but the cover/fabric looks crooked; could it have been recovered?
Is this a real 1974 Schwinn 5 speed Stingray?
Any information would help & be greatly appreciated!