This looks similar to the trailer pump that we used at the Triplex safety glass kings norton birmingham, the original trailer pump was a Scammel 500gpm that was made for use in ww2, it shattered the impellor(phospher bronze)and was dimanteld, then the climax pump was fitted to the trailer and towed beind the Austin Gypsy(AOM 53B)fire tender. This could be the same one but I am not entirely sure, hope this is of use to you. Regards Jim Fraser(ex Triplex works fire service LFm 1964-1972)
Having, gone into the types of pump used on these = "Iso-Speed" trailers, built for Coventry Climax, this is a correct rig, there are two other versions of this pump both cowled, which can be used.
Added by Alan Dunderdale on 01 January 2008.