Trying to ID a rocket carrying Typhoon lost Feb 1945

[Sean Welch]

Steve,
JR375 is a Typhoon serial number and is not a cannon number.
The link ejector chutes, under the cannon infeed drum, were stenciled with the aircraft serial number to which they were issued.
The intention was that after servicing, each aircraft would have its own equipment reissued. But as the guns were serviced at least weekly the armourers found it expedient to rotate the guns. So when they were removed a serviced set were installed.
JR375 was shot down near Cambrai 3-1-1944 and was only used by 609 Squadron. As the guns stayed within the squadron your aircraft has to be from 609 as well.

In the area and time frame of your interest 609 lost 3 aircraft:
RB311 14-2-1945 Shot down by flak Pfalzdorf. F/Lt. R.K. Gibson RAAF Killed
MN178 25-2-1945 Shot down by flak Weeze. Jean-Dennis Wathieu (Belgian) baled out (IWM has nice picture of this a/c being armed with RPs)
EK380 3-3-1945 Shot down by flak. Xanten. P/O. H. F. R. Goblet (Belgian) PoW

Sean.