Waltham Factory Mainspring for 18s Model 1877 No. 2203 – Steel Waltham Factory Mainspring, No. 2203 for 18s Model 1877, steel, new in exceedingly frail envelope. I likely have several of these so the one you get may differ slightly from the images but it will be specified strength.
A collection of love and memories woven into the story of you.