Vernier bevel protractor

 Looks like a wallpaper pattern.

DOT race bike

  Here's a 125cc racer from the DOT marque with an usual layout.    No technical details given but for some reason, the Villiers engine is tilted forward 90°, possibly to lower the center of gravity? In any case, the whole bike seems much lower than usual. Wish I had a better view, it's rather unique. They entered this motorcycle in the IoM TT in 1951 and appear to be have been successful on some level, DOT won the team award that year but did not continue the program. This layout was also not used for production bikes.

 The company was founded in 1906. They produced motorcycles until the mid thirties when they settled into making three wheel delivery vehicles. In 1949, they were sufficiently back on their feet to restart motorcycle production, producing a utilitarian two stroke motorcycle that could be modified for trials and scrambles. With the end of Villiers as an engine supplier, they eventually stopped motorcycle production again. More here.

Dellow Automobiles

 Dellow was a niche automobile company near Birmingham, England, in business between 1950 and 1957. The ads above show the final model, all the images I see are of the earlier vertical grill and separate fenders-type bodies. The cars were originally based on a Austin Seven chassis and were intended as a competitive trials car or sporty little road car. The Austin Seven-based cars were not strong enough for the rough world of trials and there was soon a new chassis with 1200 cc Ford engine and Ford axles, each car produced was different than the one before as improvements were incorporated.

More here

Hagerty

Mark V

Chisels and Chipping

Shop Theory, Henry Ford Trade School, McGraw Hill, 1943

 

Oh yeah, this will definitely be on the test.

Metropolitan police

 Dibs on the Harley!