The Bicycle 808 set has the mark E 6. The poker chips are flat with no grooves.
I bought these a few years back from a guy what had a lot of antique western items. So I assume its an Old West traveling poker set. But I really dont know anything about this set. Other than the one Bicycle set from the card itself research points to 1895 Expert Back. It looks like the jokers are missing from both decks.
The item "Antique 1895 Bicycle 808 Expert Back Playing Cards Poker Chip Set Old Gambling" is in sale since Sunday, September 13, 2020. This item is in the category "Collectibles\Paper\Playing Cards". The seller is "texasmovieantiques" and is located in Austin, Texas. This item can be shipped worldwide.