US39 - Little-Duke - can't date.

[skinny]

I've got a deck of Little-Duke playing cards with no AoS date code. There's a partial tax stamp that appears to be any of the 1924 and earlier stamps. The text Toy Cards does not appear on the box. The only other time I've seen the text Playing Cards in lieu of Toy Cards is in a thread found here:
http://www.playingcardforum.com/index.php?topic=7542.msg108829#msg108829
Those 2 decks don't appear to come from the same lot (US39 and US39a showing, different stamps).

Can someone offer help to narrow down the date of the cards?

[52plusjoker]

Seems to be US39 so approximately 1900-1910 dating. Hard to get closer without the tax stamp date.