XK140 SU's and intake

I’m posting this for a friend.

I’ve been following the discussion on the XK’s forum on identifying carbs and jets etc.

I think I now have the correct info:

Dates: M5 and M7, April and June 1957
AUC6040X with 6041 etched = XK140
SJ needles for standard A Type head XK140.

He’s looking for $400 US or close. plus postage.
Thanks,
Rob

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Actually M = 1955, and the number denotes the Month; so M5 and M7 = 1955 May and 1955 July respectively…

Thank you Roger.
I goofed up on the alphabet! M comes before N…How embarrassing.
Thank you. I enjoyed the thread. Here’s a clip:

So Mike, N5 = May 1956, and N6 = June 1956, and with Jaguar’s 6044 part number these would most probably be originally fitted to a June-Aug 1956 (allowing for typical 1-2 months lead time) XK140 or Mark VIIM. The extra numbers stamped adjacent to the N5 and N6 will tell you whether XK140, XK140MC or Mark VIIM…