there are chrome 85/2 (earliest), (later) 85/1.9 based on the same Planar formula, as well as chrome 85/1.5 which aren't much bigger, and shorter in overall length. The chrome 85/1.5 was followed by a a 85/1.5 with black lower focussing and f-Stop ring of similar outline, the chrome parts beeing not polished. Plus, there was a small series of all black 85/1.9 with a complete different mounting, but same lens design as their predecessor.
The last (and probably best) Canon 85mm was the all black 85/1.8 which was a telephoto construction, noticeable shorter overall length (also much shorter and lighter than contemporary Summicron 90/2), kept in production until the end of the screwmnount period, and also available in FL mount.
I've never seen this particular lens in a chrome version. peterm1, I think you talk about the 85/1.5
regards Frank