[78-L] Victor release date

[Han Enderman]

http://www.ebay.com/itm/SOPHIE-TUCKER-Doing-What-Im-Doing-for-Love-Feathering-My-Nest-Victor-21993-/271259361412?pt=Music_on_Vinyl&hash=item3f28516084&nma=true&si=u%252FpLh8ZwP%252BUcu%252FJ%252BovSAljvCJ7E%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557#ht_920wt_981

Here (# 271259361412) is shown (still visible for a few days):
SOPHIE TUCKER: Doing What I'm Doing for Love & Feathering My Nest / Victor 21993
in its orig. dealer sleeve, which has printed date July 5, 1929.
Apparently the official release date.

Two questions:
- was it forbidden to sell the record before this date?
- how many release dates there were each month?
The major companies issued monthly catalogue supplements, but how 
did such months relate to the actual date(s) of release?

han enderman