[78-L] Ballroom Disc

[Han Enderman]

An uncommon variant of Moses Asch's Disc label (Ballroom Disc) can still be seen at
ebay # 290620537098.

http://www.ebay.com/itm/78-BALLROOM-DANCING-BALLROOM-DISC-SAMBA-ORCH-AQUARELA-BRASILEIRA-NAO-TENHO-LAGRI-/290620537098?pt=Music_on_Vinyl&hash=item43aa55790a

I already had a good image of Disc 10443-B (mx D483), by the same orchestra.
Does anyone have some info on this 10000 series? I do not think there were 443 issues in it. 
Does it refer to 10" album 44 or something like that?

And are the rim lines a stroboscope (I didn't start counting)?

han enderman