Pictured below is a 1949 Albion 'Valiant' CX39N with ACB coach body.
It featured a 9.9-litre EN243 oil engine, driving through a 4-speed constant-mesh gearbox with an auxiliary overdrive box - all Albion-built units from Scotstoun!
The 6-cylinder engine was both silky-smooth and quiet, and there were two gear sticks - one for the 'main' 'box and one for the overdrive unit.
A 'Valiant' could really fly along!
'ACB' stood for Associated Coach Builders of Sunderland (IIRC!

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I took this photo at the Corgi Toys 'Great Little Motor Show' at Donington Park in September 1995.
We also attended with our (then) AEC Reliance bus, and enjoyed some great Geordie company that weekend.

Economic had two of these machines, and both have survived in preservation.
This beauty was professionally restored by aquaintances of ours from Spennymoor, and is an absolutely faultless achievement on their part .......
"Because we're fookin' good, Taff" they proudly proclaimed!
"Seeing is believing" is all a can see aboot thee work o' these two canny lads!
'Economic' was the trading name of E W Wilson of Whitburn.
This companies' primary concern was the operation of stage-carriage services in it's locality, and sold-out to the Tyne & Wear PTE in the 1970s.
For some years, they favoured the AEC Reliance chassis for these duties.
Will get Ms Zoom to post-up some shots of the superb signwriting that adorns this masterpiece soon