You have a 1918 Singer Model 99k. Based on your model number, I can tell you that it was built in what was then Singer's largest factory, in Kilbowie, Scotland. Although it is a somewhat rare machine, there are still quite a few in existence. In good condition, it is valued at roughly $300. In fair condition $200. In poor condition $100. I hope this is helpful, and if you have any questions, etc. about it, feel free to contact me at
[email protected].
Have a great day!
Major