What;s MM/100 means

[Cleary]

I looked for hours and can't identify this... Any ideas?
https://imgur.com/gallery/PhGHPYz

[dognose]

Hi,

Welcome to the Forum.

Please embed your images, as very few members will click on links.

https://postimages.org (choose 'Share', then copy the 'Hotlink for forums' code) is recommended. Do not use Photobucket or Dropbox.

Trev.