I always assumed that these frames were the Racer and predecessor to the "lightweights" that kicked off in the late 30s (Paramount, Superior, New World), as shown in that catalog image above.
I have two of these saved. Obviously the first example has been tinkered with and new decals, and maybe other parts added, but you can see the frame and the crank setup matches the two shown in this thread. The first one is Lincoln badged.
The second one the frame is consistent and more parts aligned to the Racer, but the chain ring potentially swapped. No badge found on this one, but you can see vertical mounting holes (Lincoln?). Does have the Persons saddle, which is what these would have had.
Maybe as they were switching over to tourist setups they had to use some Racer frames to get those efforts going (edit - just realized this could not take place because of the seat post clamp issue stated next). The one thing I don't get is the difference in the seat post clamp setup, so that is something you can't convert over from a Racer...which makes me think the three tourist frames shown are some sort of transitional thing.
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