WICO Magneto Impulse Spring. B.F. Avery & Sons – A, BF, R (all with WICO Magnetos #C1163, XH1163, C1180, XH1180, C1604, XH1604). Case – with WICO Magnetos #C184, XH184, C894, XH894, C1343, C1344, XH1344, C1950, XH1950, C2239, XH2239, C2500, XH2500, C2700, XHD2700.
