These cards are a nice mix of replica and modern.  Seems to be plastic coated (I wonder what the "ivory surface" was like with the originals), and indeed no numbers.  If using as single head cards (for things like fortune telling), on the decorative backs there is a little "USGS" printed at the bottom right (in the rightmost flower); this can help in telling which side is heads (especially with the tens...those are symmetrical).  Be careful, they are a bit "pokey" when shuffling as the corners are NOT rounded...a fun deck, and a nice change from what I am used to!