Well... it came down to me making an 'executive decision' !!
Firstly my supplier, even though they have all the artwork for 'Smiths' gauges back to the'50s and also engineering drawings ( Smith and Jaeger are identical internally! ) , they don't have any artwork for Jaeger! So, all the gauges I have done I have to pay them to do the 'custom' artwork to my spec which has been pics of original gauges and some are bespoke like the voltmeter, 8k tach and GPS speedo.
I have original MK1 water temp and fuel gauge samples here that have 'Made in UK' on some and 'Made in England' on others.
ALL the MK1 oil pressure gauge samples ( I don't reproduce those ) have Made in England on them.
I think all the 2" Jaeger MKII gauges I have are 'UK'... even the oil pressure . Confused yet ??
Now, the 'new' voltmeters ...ALL the Lucas ammeters ( both MK1 and MKII ) I've seen say Made in England
So, as sort of the middle ground, lol I went with 'Made in England' on the Voltmeters and 'Made in UK' on the water/fuel