The product is a Martin Fly Fishing No 67N Fly Fishing Reel with a diameter of 3 1/4 inches. This reel is specifically designed for fly fishing, making it suitable for anglers who enjoy this particular style of fishing. The mention of it being a "Lost Rarer" suggests that this model may be harder to come by or considered a rare find among fishing enthusiasts. Overall, the Martin No 67N Fly Fishing Reel appears to be a specialized and potentially sought-after piece of equipment for fly fishing enthusiasts.