These are engraved chips, made by the US Playing Card Company. I think 1890s is too early; I
think that they're probably no earlier than 1910, but I can't say for sure.
@Jeff in Iowa may be able to pin down the range more closely.
The specific design you've found is on display
here, along with some other examples of this type of engraved chip; there are more such examples
here and
here.
These chips are old but they're not particularly valuable. You can find them on
eBay easily, but usually only in small lots mixed in with a lot of other old and otherwise unremarkable chips. Some
eBay sellers may be asking ridiculous prices for singles, but very few poker chip collectors would be interested in paying much for these, if anything at all. These are generic designs, marketed by USPCC to the general public for home use, whereas most poker chip collectors are more interested in chips that were actually in use in casinos and card rooms rather than home games.
That said, if you like them, they're worth whatever you want to pay for them. I agree that the design is pretty cool. One big consideration is that while these chips are pretty common, finding a complete and matched set of them is fairly unusual. If you want a playable set, you'll either need to wait for a complete set like this to come up for sale (which isn't very often) OR you'll need to build it yourself over time by picking up small batches here and there and hoping that the colors match each other.
If you like them, buy them, but don't expect anyone else to like them as much as you do, and don't expect to get your money back out of them if you decide to sell them. The seller isn't likely to get much interest from anyone else either, so you ought to be able to negotiate a pretty low price if you feel like negotiating rather than just taking their asking price. Ten cents per chip wouldn't be unreasonable for either the buyer or the seller. The chips on their own aren't worth even that much, but there's some value simply in having a pre-assembled set that you like the design of.
These are vintage chips, and as such have a very different look and feel from modern chips. Mostly here on PCF we talk about and prefer modern chips. Don't let that stop you from picking these up, but understand that if you try to compare them to any other chips you might purchase you'll find they're very different. That's not necessarily bad... just different.
Welcome to the forum!