Even with the risk that comes with shooting an old bow, if it were mine I would definitely want to provided everything about it seemed sound. I like to think that whoever made it would have liked to see it still shooting after all these years. I would consider sending it to an experienced bowyer to examine it closely before shooting it, i'm sure there are those on here that would volunteer for that task, you may even find someone that is fairly local.
I can imagine finding such a thing and shooting it even just a few times would feel like I did when I had the chance to fire a 102 year old 1911. Even a WWI war relic deserves it's moment in the sun every decade or so. I would feel similar if I found an old yew bow that was in good working order.