Hi PDX

Here's what I've learned from my experience with the Skyriters. Some members with more experience may add more information or correct me on a few facts. Tom The Typewriterman is the authority when it comes to British built typewriters.

1X- and 1Y- were the genesis for the Skyriter, the Smith-Corona Zephyr. The 2Y- series Skyriters had the clamshell metal cover and the short line advance (return) lever. The 3Y- series had the long line space lever and came in a soft case. The 4Y- series also had the long line advance lever was made in the re-tooled British Typewriters factory in West Bromwich, England and came in a much stiffer leatherette finish case.

With having cleaned and serviced various specimens of all these models, I haven't seen any substantial difference in the basic internal workings of these machines. The basic design of the 1X-Zephyr and 1Y-Zephyr Deluxe was evidently adequately reliable that it did not require any substantial re-engineering.

The 5Y- and 6Y- series lightweight Corsair, Calypso Cougar and Profile (to name a few) had the exact same internal mechanism but with a few more plastic parts placed into a plastic shell. I've also worked on 1 7Y- Super-G and it also appeared to have the same basic mechanism as all its predecessors.

Hope this gives you something to work with,

Sky