I was wondering if the yellow sticker will help identify the manufacturer of the prop. I recently bought the 1989 Astro Quickfire 19SC bass boat with a 200 Black Max Mercury from a neighbor who purchased the boat from the original owner in the mid nineties. My neighbor said the prop was custom ordered for this boat by the original owner. The engine turns 5800 RPM loaded with full fuel and two people. When I'm alone with light fuel it will turn 5950 after trimming for max speed. The hole shot is good, and top speed is fast enough for me, the prop seems to be a perfect match for the boat, but I'm courteous who made it?