A few months ago there was an interesting thread here about the early 200mm f/4 "chrome nose," which had been spotted in an auction. I recently snagged one that is a true "hangar queen," in pristine condition including an unbelievable hard case "J." There was no photo posted in the older thread, so I'm going to play show-and-tell today. This lens is date coded September, 1970. I've read of only one earlier date, a lens produced in August, 1970. Like some other early examples, this 200mm has two "reserved pins" on the mount. The knurled chrome ring is threaded onto the rear of the sliding hood. I know of at least one manufacturer (not of cameras) who used to begin a production run with serial number 501, so that people wouldn't think they got the very first units off the line. Does anyone know if Canon did something similar? The lowest serial I've ever seen on a lens is 101xx. Perhaps lens number 101 (10101) was the first off the line? Forgive me for not simply appending this to the older thread, but I thought some others who might not follow new additions to older threads might like to see it.