Check the listing for details. USAF US Air Force First Sergeant Diamond Insignia Pin Pair Rare Obsolete. Condition: New. Listed at 10.00 USD. Listed here is a pair of USAF US Air Force Male First Sergeant Diamond Insignia Pin which is now rare and obsolete. These First Sergeant diamond pin insignia would be used with the dress blues pin. This diamond pin would be used along with Master Sergeant rank insignia to indicate the First Sergeant for a unit from 1955 to 1993 when the rank format was changed to its current form and now is obsolete. These First Sergeant diamond insignia are a very rare and unique find for militaria collections or for those who need them for shadow boxes. These USAF First Sergeant Diamond pin insignia manufacturer is His Lordship Industries of Hauppauge, New York and were made in June 1985. This First Sergeant Diamonds are new in their original packaging and were found in my travels and are now be presented to the world through this eBay listing. Please feel free to contact me if you have further questions and/or want more photos of this item. Please note that the cost of shipping is included total sales price of the item for the USA and willing to give a shipping discount if multiple items are purchased at the same time for both domestic and international shipping. Please note that you must pay extra to ship to international address. Enjoy! Check out my other items! Be sure to add me to your favorites list!