Douglas - For Sale Items

Douglas 1913 Model P motorcycle

Douglas - Wanted Items

Douglas 1915 3 Spd-Gearbox and Clutch

Recent Posts

Quick Comments

Lat Fuller

2025-07-20, 02:39:50
I am pretty desperate for a rear cylinder for my veteran Douglas 1917 2 3/4hp "W" model.   I there is anyone who may have one of these that can be re-sleeved or know where I may find one I would be very pleased for the help.  I have a number of engine parts that I can exchange such as matching crankcases, conrods, crankshaft, flywheel etc. Any help appreciated.

Lat Fuller

2025-06-04, 05:57:00
Does anyone have the specifications for the oil inlet valve spring for early 2 3/4 engines - Part number 424.   I have tried to order one from the club spares but apparently Jeff Swan is indisposed at the moment.

skapoor

2025-05-19, 09:23:12
I am looking for a carburettor for veteran Douglas motorcycle engine-13651. Could you please help me with this?

BTH Ammeter and Head light early 30’s

Started by vincenttwin, 07 Oct 2025 at 16:10

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

vincenttwin

Could some one take a photo of the BTH ammeter ,and one with a ruler on it so I can get the size of the face plate ( maybe 1.98") as I plan on getting some face plates
Silkscreened .
Also a few clear photos of the BTH with Powell & Hanmer  headlight
Brass plaque  as I think I have found a person to make them .
Thanks for your help.
Peter Allen

richard s1

Hi Peter  
   The OD of the S/T6 ammeter face is  1.54", or 39.25 mm if you prefer!,  and the OD of the BTH logo on headlamp is 0.950", or 24.15 mm.   The logo should be a thin plated brass pressing, secured by a tiny rivet in the middle, but the one in the photo is a lost wax casting of the same dimensions.

Richard

EW-Ron

I'll bite - what is the connection between BTH and Powell and Hanmer.  ?

Or is the connection that they were both used on Douglas motorcycles,  at times ??
Jist curious.

vincenttwin

BTH never made headlight they were sourced out to p+H .

vincenttwin

Quote from: richard s1 on 08 Oct 2025 at 20:31 Hi Peter 
  The OD of the S/T6 ammeter face is  1.54", or 39.25 mm if you prefer!,  and the OD of the BTH logo on headlamp is 0.950", or 24.15 mm.  The logo should be a thin plated brass pressing, secured by a tiny rivet in the middle, but the one in the photo is a lost wax casting of the same dimensions.

Richard

vincenttwin

Thanks perfect ,  I will let you know if I get get them made .
My plan for the 1934 HRD Python is
To use the early Lucas headlight shell
And replicate the  bth .parts as the real shell is like gold dust .

richard s1

Powell & Hanmer were makers of lights and lighting equipment from the turn of the century.  They were very prolific in making acetylene lighting.  Second only to Lucas.

germanxxx

Hello Peter,

With the help from many others on from the forum, I've made up some BTH medallions. You may still need to do some final finishing but I think they are fairly accurate and nice. let me know if you maybe interested. I'd also be interested in hearing your plans for manufacture.