A professional who performs any combination of following tasks involved in finishing and inspecting metal phonograph matrices after electroplating processes. Respnsibilities include:

• Strips (separates) master, mother, and stamper matrices, using handtools, files, and knife.
• Holds matrices against sanding belt or grinding wheel of bench grinder to remove burrs.
• Punches center hole in stamper and mother matrices, using punch press.
• Fills offcenter holes with solder, using soldering iron or acetylene torch.
• Steam cleans and polishes matrices, using brushes, cloths, and polishing compounds.
• Examines stamper matrices for defects, and weighs matrices to ensure conformance to standards, using scale.
• Cuts and flares edges of stamper matrices, using press.
• Marks identifying information on master matrices, using scribe.