Carl Meyer was Burke and James' house brand for lenses. B&J acquired complete lenses, lens elements, floor sweepings from optical shops, ... rehoused the lenses and sold them as their own. Some, it is said, were assembled from elements that failed QC and were horrible. Others were perfectly good. Carl Meyer Dagors are supposed to be in the first category. My friend Charlie Barringer bought a Carl Meyer Sonnar for pennies and said it was a very good lens.
Mark, take a close look at your prize. On the one hand, OT-453 feels like a Kodak serial number. It might be an f/1.5 Fluoro Ektar, if so many elements in three groups.