Swap / Trade knickerbocker New York shot gun 1890 22 cal Cowichan Valley / Duncan Jun 30, 2024 - 1:21 PM Rick flint I have a 12 gauge Knickerbocker double barrel shot gun needing the butt stock replace or fix. Seem to be a problem with wood rot on these old girls. I took it in on a trade so i really know nothing about it.