>>961820All that matters is whether you like how it rides or not. You can easily find a hiten shitter that is reliable and smooth. Alternately there are many 531 race frames that flop around like a limp dick or you could find a 3rensho that wants to kill you when you ride down a hill.
Basically though, in the 70s, bolt on RD hanger, cottered cranks and a derailer with a heavy stamped steel bash guard means a low end bike. I'm pretty sure those are stamped dropouts too. Do the lugs have a seam? If so they're stamped steel as well (as opposed to higher quality forged) and will definitely be joining gas pipe tube together. Pretty much all road bikes from that era are lugged, and now, modern butted alloys can be tig welded and lugs or no lugs means nothing.
Is it heavy as fuck? That's an easy tell.
