Hi Paul and Vincent,
Found this email from the late Ralph Hawkins, re the '37 NG and the '34 LH with the deeper red colour.
I was sure I had some evidence that the NG was originally green from the factory.
The rims were black, with green centres.
Interesting about the 10:1 piston for the LH - at a time when 7.5:1 was high compression. When my dad bought the bike, I remember there was a story about it being special in some way, but I don't know any details. It does have what I think are big ports and valves for a 250. It's still in more or less original (cough) patina - a 'one day' project.
I have a later green VG - well most of one - but it doesn't have badges ('46) and the paint is quite faded - so it's not so much use for colour matching.
".....Both your bikes were despatched to Tozer, Kemsley & Millbourn of London. They are shipping agents who had branches around the world so both are likely to have gone to Australia.
Both bikes are noted as having Hilly Country Gears which is a grand way of saying that the engine sprocket was midway between the standard solo and sidecar sizes.
The NG is noted as minus tyres and with 26x3.25 rims. It had as extras pillion footrests, a carrier and an 80mph speedometer.
It was finished in green. It was despatched on 21-10-36 but was an early 1937 model. The green finish was introduced for export machines in 1937 and was an option on Square Fours and the de Luxe singles, i.e. LG, NG and VB. There was no mention of it in the UK catalogues. On the Square Fours it applies to the tank and wheel rims, both with gold lining but the overseas catalogue does not mention the wheel rims for the de Luxe models. Whether you choose to have green or black rims I am sure you are unlikely to meet anyone who can tell you that you have got it wrong. Draganflys suggest Brunswick Green or BMC Reseda Green as good matches.
I would have expected the frame prefix letters to be 'XF' but as they continued the one series of numbers from 1936 to 1937 and just added the 'X' for 1937 it is possible that they had not got round to it when they made yours. The engine series starts at BC 101 so yours is the 253rd of the 1937 models.
The LH is a 1934 model Red Hunter. It had a magdyno, Altette horn, pillion seat and footrests and an unspecified speedometer - it would have been an 80mph one. It had a spare 10 to 1 piston and was despatched on 18-4-34. No mention of colour so it would have been the catalogue standard of all black plus red and chromium gold lined petrol tank and chromium wheel rims with red centers again lined with gold.
The red is Post Office Red also known as Currant Red which has a British Standards reference number of 539 in B.S.381C:1988.
I am attaching the relevant catalogue pages.
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.