Originally Posted by J Miller

Ruiz,

The "K" in the 99K indicates it was made in Clydebank (UK).

There is a tremendous amount of information on your machine in the ISMACS site:
{ http://www.ismacs.net/home.html }
Including serial numbers, production quantities and dates for many many Singers as well as other machines.

If you look in the owners manual there is a section on accessories. Lots of accessories for that machine. It is a low shank machine and uses common Class 66 metal bobbins as well as the common 15x1 needles.
It's the 3/4 sized version of Singers Model 66 machine.

Joe