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(Topic ID: 183772)

GTB cabinet markings

By wayner

7 years ago



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  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 7 years ago by Darcy
  • No one calls this topic a favorite

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#1 7 years ago
OP
 
WAR

wayner

Pinside member

10y 95,300 2,584 25

During resto of a number of GTB 70s machines I have noted a football shape marking indentation on each side of cabinets. Does anyone know the reason-are they manufacturing jig marks?

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#2 7 years ago
 
SKY

Skypilot

Pirates Life Pinball Co

11y 155K 6,677 32 1

Those are plywood plugs. Nothing to do with the game manufacturing.

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#3 7 years ago
 
DAD

boilerman

Pinside member

US Oxford, PA

11y 72,550 3,899 14

they are repairs to defects in the plywood

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#4 7 years ago
OP
 
WAR

wayner

Pinside member

10y 95,300 2,584 25

Thks for advice. I had never heard of plywood plugs but now realise they were used on lower grade plywood where 'visual impact' not so important.

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#5 7 years ago
 
SKY

Skypilot

Pirates Life Pinball Co

11y 155K 6,677 32 1

They were and are used in areas where knots blemished the flat grain.

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#6 7 years ago
 
DC

Darcy

Pinside member

CA Leduc, AB

11y 124K 6,360 17

By using lower grade plywood, those plugs stood out when painted a solid colour. So splatter paint was used to camouflage the defects in the plywood. They could of used a plywood grade with 1 clear side (Grade AA-B I think), and have the plugs on the inside, but cost savings were common.

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