In the past week or so two readers have asked for directions in finding the serial numbers on their typewriters, a later model Imperial Good Companion portable and an L.C.Smith No 8 14-inch carriage standard. By chance, while looking for something else entirely, I came across this page from Wilf Beeching's Century of the Typewriter (1974 edition). It's not a complete guide by any means, but it may help some. For example, later model Imperial portables don't have the serial number where Beeching points to, but underneath the left side ribbon capstan. I hope this helps John, who owns the L.C.Smith seen below. John wrote, "The serial number has eluded me. I have flipped it on all sides, slid the platen to both the extreme right and left and snooped around with a bright flashlight - all to no avail." Don't feel alone, John, I am very familiar with that sense of frustration!