If rowland hill hadn't come up with the idea for these philatelists would have nothing to collect

Below you can find the If rowland hill hadn't come up with the idea for these philatelists would have nothing to collect Jeopardy Words Answer. The answer to If rowland hill hadn't come up with the idea for these philatelists would have nothing to collect has 6 letters. This clue belongs to the Inventions category and is part of Jeopardy Word Level 593. If you scroll near the bottom you will find other clues and answers part of level 593