Other Exonimia Help - 1893 Columbian Exposition

Very interesting.

Look like printing stamps or press dies.
Maybe used for envelopes, pamphlets or cards.

Thanks for the replies and help. If anyone else reads this and happens to know what tool or device these would have gone into to make the impressions, I would really love to know so I can try to find one of those too. I've tried searching for embossers a while back and had no luck finding anything they might have fit in. If there's some other term or tool to try searching for, please let me know. I have no idea what to call these things other than discs or dies and "embosser" is the only thing that comes to mind to search for. Any help or advice is greatly appreciated. I would love to have the tool that would have been used in and possibly be able to make these impressions myself.

I don't think you have to look for any type of apparatus for these.
I think you'll find they were attached to a small wooden handle similar to what a post office would use in this time period essentially a hand stamp.
Wood blocks as shown below are more in line to what a printer would use In this time period.
Perhaps they popped them off the handles to use the handles for the next ones.
This is just my opinion.

Cheers, Bill

Thanks Circus, I never thought about checking at a hobby lobby or michaels store to see what they might have. I've searched and searched for vintage embossers online and never could find one that took small dies/inserts like I have. These are just about 1" in diameter and everything I find looks like they are for much larger embossing designs/seals. I just thought it would be really cool if I could find an antique embosser/tool that these would have been used in so that I could display them in a way that shows how they were used. Funny you mentioned a press like a large pair of pliers because that's sort of what my thoughts were too, but I couldn't find anything that looked right. I even looked into tools for leather work and nothing associated with that looked right either.

I have a huge collection of Columbian Expo items of all types and nothing I have in my collection nor anything I've seen has had any of these impressions/embossings on them other than the card and piece of brass that came with them. They are really cool items for my collection, but they just have me stumped on exactly what they were used for and why I have never ran across anything else with the design imprinted or embossed on it. I do have several paper items in my collection that were letters and invitations to different commissioners and board members from up to 2 years before and throughout the expo and they don't have any embossing like this either. They just have me really stumped and thought I might get some ideas to work with from folks here. Thanks for the suggestions and if anyone else has any info that might help, please let me know!