Joined: Feb 2012
Posts: 19,373
Likes: 5,516
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Nicer photo! Note the equal set back from the drop out to the chainstay end (on both sides). There may be enough clearance to remove the wheel without the cog contacting the RH inside of the chain stay but that open expanse of drop out tab, compared to the tighter set back of the domed seat stays are out of balance visually.
I doubt you'll ever find out the real maker of this frame. In the mid 1970s there were hundreds of frame kits sold by Proteus, Cycle Imports (on the East coast) and many others. The fledging/learning "builders" were influenced by what they saw in magazines and such. The skills were all across the board and while some aspects of the frame would display real craft on the same frame there would be voids of effort of class.
I don't know if this is an American built frame but I see some of the aspect that I suffered with in my beginnings. Andy