eBay

These are NOS never been opened. Lot includes

3x EO-40 EASY-ON ADAPTOR- that fits Astatic microphone

Models 840, 840 Gold, 8405 and 8405 Gold..

4x:MODEL NC-40 NECK CORD and TC-40 TIE CLIP: Made

to convert Astatic 840 Series mic from hand held to lavalier use.

Link to original catalog:

https://www.preservationsound.com/wp-content/uploads/2012/07/Astatic_Catalog_197.pdf