EM playfield glass size

Most EMs from 1947 on take 21 x 43 inch, 3/16 inch thick tempered glass. Early-1970s Bally games with a metal-framed glass (such as Fireball and Four Million B.C.) take 21 x 41.5 x 3/16 inch tempered.

Use only tempered glass; ordinary plate glass breaks into dangerous shards.

Systems

• Electro-mechanical

Games

• Four Million B.C.

Related tips

• Playfield glass sizes
• Keep the glass on and the playfield covered

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)