This just followed me home (drive side pics later):



I've been looking it up. Romet was a brand of the nationalized polish bike manufacturer, and at the time the Sport was made it apparently was a top-line model. I think this is an 86, the decals are consistent with net pics and the serial starts with 86 in a different font from the subsequent-and-irregularly-stamped digits:



It looks a bit of a mix of good and bad. One shifter boss is crooked, the top-tube guides are cheap, the chainstay bridge is cheap and ugly:






On the other hand, the dropouts are good enough, the crown is a nice solid bit of casting, and the brake bridge looks the business:






The numbers are 52cm seat tube, c-c; 2295g bare frame, 845g fork with crown race,and a 25.6 post fits no trouble. Not a featherweight, but not likely to break either.
The tubes are imperial, so is the threading. My little fingers say there is no seam in the chainstays, and the forks don't show one from the outside.

Pics of the components next - Iron Curtain copies of Campag, Simplex, TA, Mafac, Shimano (those nasty black plastic shift levers)...