This vintage pin is marked CH 830 S. Measures approximately 2-1/16" (5.3 cm) by 1/4" (0.6 cm). Weighs 8.7 grams. Has the older style C-clasp. Great condition. I have left the original patina. 
Postage price includes insured shipping with delivery confirmation in the US, and insured international shipping to most countries.

Always happy to combine shipping.

Thanks! El & Ned