My apologies for dragging up an old thread but I have recently updated the entry for MH350 in “The Book” and I have come across a reference which suggests that some of No. 485 Sqdn’s Spitfires had their armament changed “just before D-Day” from the standard 2 Hispano cannon and 4 Browning .303 inch machine guns to the “e” configuration of 2 Hispano cannon and 2 .5 inch Browning M2 machine guns.
MH350 started out life as a standard L.F.IX when delivered to No 485 Sqdn in August 1943 but by the time it went to Norway in May 1945 it was sporting the “e” type armament which it still has today.

MH350 was on strength with No. 485 Sqdn during June 1944 but was transferred to No. 84 Group Support Unit, 2nd TAF, at Aston Down, Wilts, on 15 June (paperwork date?) and the remainder of the squadron is said to have converted to the L.F.IXe following their move to Coolham, Sussex, at the end of June 1944.
I’m wondering if anyone has a copy of the ORB for No. 485 Sqdn for June 1944 which may shed some light on this?
Was MH350 converted in June 1944 or later in its career?
Thanks!