Hi Leon
Thanks for the link, I am calling that style of headlight the P & H type, The little badge on the top, has made in England around the top edge with a large P & H. the top of the letters shaped to suit the curve, under which is written Powell & Hanmer Ltd. and under that Birmingham. I think this lamp may well have been introduced at the around the same time as the tartan tank panels. I assume this type of light continued to be fitted until around 1934, though may well of been out of production for a while and they were just using up old stock. Certainly P & H moved away from supplying components to the motor trade by the mid 30's may be slightly earlier but the company lasted till around 1982.
With the redesign for 1934 season saw introduction of the 8" headlight and tank panel switchgear, presumably all supplied by Miller, on the larger capacity machines. I am not sure what was standard headlight on the likes of the early Comet & Cotswold as they still retained the S/6 styled tank, and did not come out with the more rounded tank until around 1935, I assume these later models were also fitted with a tank panel.
The Aero model on which the tank panel was deleted, also used a Miller headlight with a switch fitted.
The earlier type of lamp which I am calling the BTH type is shown as fitted to a T/6 in the Douglas advert shown. It had a bakelite knob at the rear similar to the one shown below. It appears that there were a couple of different patterns, some appear to be more streamlined like the P & H type whereas others like that shown on the early T/6 advert. appear quite bulbous, with a tighter radius at the rear down to the switch.
It would be interesting if anybody has copies of the Blue & Green on for the period around the 1930 Motiorcycle show issue to see if there is any reference to the style of Headlight fitted, and whether the Tartan was introduced then, or was it later.
