Nostalgia has struck and I'm looking to replace my first slide
rules. The originals disappeared years ago. I think I have
identified the model numbers, but if someone who knows the
models can confirm they were available those years, I would
appreciate it.

The first was purchased September 1970 and I believe it was a
Post 1447 with gray hard case. That model looks right, but I
was unable to find anywhere that had the model numbers and the
years they were made.

The second was issued at West Point in September 1974. I
believe it was a K+E 68-1100 with orange leather case and tan
hardcover manual. Do I have the right model for that time?

Thanks

Chuck