[78-L] Lang-Worth 8" transcriptions

[Han Enderman]

Recently a group of Lang-Worth 8" transcriptions was auctioned by seller bap124.
For ex., ebay # 350356110192.

The cat.nrs are preceded by a "prefix", which seems to indicate the music type.
It appears there are at least 2 series, since cat.nr 70-A/B is known twice,
with "prefix" CI (Collector's Items) and DS.
Other descriptive prefixes are VoS (Vocals), IN (instr.), VGL/VGS (vocal group large/small ??), etc.
The CI labels (blue with silver print) are different from the other labels (white with blue print).

Questions:
Are there only 2 numerical series: general (with several prefixes) & CI ?
What is the range of these series?
After some time the prefix is DL for all(?) 8" issues.
What is the exact meaning of these prefixes?

Han Endrman