McInnes-Dobbie steam locomotive indicatorSteam Locomotive Indicator, 'McInnes-Dobbie' Indicator. In wooden box marked 'Dobbie McInnes Ltd Glasgow & London'. Class A (Large Size) with details and instructions inside box lid (box 12 inch x 8 1/2 inch x 5 31/2 inch). Appears to be in working condition, box contains 3 springs. …