Check us out on YouTube; https://www.youtube.com/c/JRCLOCKER
Our Ebay seller Spotlight; https://www.youtube.com/watch?v=wopk1nUpd_U&t=6s
Waltham 1+ 0 Size watch Mainspring Part No. 2216 - MX1773
MX1773
For your consideration we have a "new old stock" Waltham 1 & 0 size mainspring, part No. 2216. Model number 1882 - 1887.
Please see pictures.Good for the professional, beginner, or hobbyist!