Optical Goods Maker/Repairer [cameras, lenses]

Tool and Die Makers [Tool and Die Maker Apprentices]

Machinists [Machinist Apprentice]

Boilermakers

Precision Grinders/Tool Sharpeners

Patternmakers and Modelmakers, Metal

Layout Workers [figuring the best cuts out of a piece of something]

Engravers, Metal

Watchmaker