Not a single mark

obviously this wouldn’t fit my dachshund legs….

but I’m so curious, I’m going back with calipers and measure the bb (68-70?) and seat post.

I had two others (on another site w more frame-builders) message me that it some Jim Merz elements.

Merz bikes usually had JM followed by numbers, but on his registry, some were left blank.

Im not the guy to say it’s a Merz unless the man himself does.