Identify this enlarging lens: O & ER

I recently acquired a large cache of enlarging lenses with some darkroom

equipment. They were mostly common but high grade brands/models but there was

one that I haven't been able to track down. It's an O & ER, marked Reston, VA

and is a 4.5/135mm, made in Japan. It's a bit intriguing because it has a nice,

sixteen blade iris and while it's compact (with 39mm thread), it seems to be of

decent quality of manufacture. Googling didn't bring up anything but I thought

that perhaps someone might have some idea about this.

Maybe it's just another re-badged generic but the mechanicals seem to be of

decent quality and it seems of relatively modern design. I get 6 reflections of

light with a point source so perhaps it's a simple triplet?

Among other things, O+ER sold ID cameras that took Polaroid film. Y'r lens may have come from one.

If only 6 bright and no faint reflections, it sounds like a triplet. Still worth a trial to make sure it isn't a real treasure. And who knows? It might be. Odds are against, but it might be.