Studio 80
~ Label
Annotation
Looking at releases from this label on Discogs, it seems the recording studio has used its production numbers (which are often used as catalog numbers on Discogs) to indicate the artist as well as the recording and production date.
Format: AB-YYMM
AB = abbreviation of the artist (e.g. MR = Musikkapelle Rettenberg)
YY = two-digit year
MM = two-digit month
If you look at the release
https://www.discogs.com/de/release/24896801-Wolftal-Express-Kl%C3%A4nge-Aus-Dem-Schwarzwald/image/SW1hZ2U6ODU5MTAyMzk=
for example, the images associated with the release correlate the production number "WE-9105" with the artist Wolftal-Express and (as printed in the liner notes) a recording and production date of April/May 1991.
