I have one, also, in a similar poster-like holder with the info. Have made some inquiries and done some research, including with the salvage and marketing companies...seems to be legit from what I've gleaned, but not really much value of any sort.
Oh nice! I like the holder it came in! Very unique coins. I just received a 1890 1 cent Straits Settlement coin in a lot.
Very cool gift! I have a few examples in my collection that were salvaged in small clumps of 2-3 coins. I have yet to get around to photographing them, but they make for interesting conversation pieces. Matthew Boulton struck these coins at the Soho Mint, which is my area of focus. Over the years, I have acquired a few of the proof strikes that have retained their original shells and wrappers. Here is an example of the 1808 10 Cash piece struck for the Madras Presidency.
