HP 41C Manual vs HP 41CX

[Steve Simpkin]

I think there may be some confusion between the terms "Spiral binding" and "Wire binding". Spiral binding is usually made from plastic. HP typically used wire binding on their earlier manuals. There are also a number of variations on each type.

Here is an example of the type of wire binding HP used on their early HP-41C and HP41CV handbooks.




Edit: HP was still using wire binding up until at least the early 1990's. Here is an example of the HP-48SX handbooks.