{"product_id":"swartchild-vintage-glass-pocket-watch-crystal-16-2-16-40-9mm-nos","title":"Swartchild Vintage Glass Pocket Watch Crystal 18-2\/16 (~40.9mm) - NOS","description":"\u003cp\u003e\u003cstrong\u003eSwartchild\u003c\/strong\u003e Vintage Glass Pocket Watch Crystal size 18-2\/16 = ~40.9mm (marked) with a thickness of between 0.9mm and 1.1mm. Swartchild usually marked their glass crystal with two numbers presumably to address the size variation common in glass crystals, hence the 1\/16 difference between the two. This one is a low Lunette profile crystal which you can hopefully see in the images.  While still likely over 100 years old, in my 40 years of experience with them I've not found the older crystals to be any more or less brittle than anything you could find today. That said, they are quite likely dirty and need serious cleaning.  I have a supply of crystals that numbers in the hundreds of thousands so I can usually supply just about any size Watch Crystal you need (glass or acrylic) so feel free to inquire. Images do an adequate job of representing the item.\u003cbr\u003e\u003c\/p\u003e","brand":"Swartchild","offers":[{"title":"Default Title","offer_id":48861528588596,"sku":"CGC-SWAMLUN409-08","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-1710.33.01.jpg?v=1755452235","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-vintage-glass-pocket-watch-crystal-16-2-16-40-9mm-nos","provider":"Vintage Time Parts","version":"1.0","type":"link"}