Mint Test Coil

This will be my first "meaningful" post. I just joined a few days ago and have spent hours going thru the posts on this site. Very very impressive amount of knowledge represented here. I don't have much to offer in the way of specialized knowledge myself so the only thing I know to do (to get involved in the community) is to post a few scans of material left over from liquidating my collection 15 years ago. Maybe some will find it of mild interest.

TD111 (if lite brown)??) Used by Postal mechanics in the repair of stamp vending machines (either in field or shop) or to test after initial machine installations in the field. There are also test booklets (ATM format)for their newer Automated Postal Center equipment. Most (if not all) of the stamp vending equipment has been removed from service and the APC equipment installed where feasible & space allows.

I would guess the stamps shown are "black" in color, so it would either be a TD107 (design 19.5mm wide) with varieties known to have dull, shiny or pebbled gum or a TD112 (design 19.0mm wide, with dull gum only).