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  1. By OPDB
    display_type
    Backglass Lights
    month
    2
    name
    21
    opdb_id
    G48W0-MDy3v
    player_count
    1
    technology_generation
    Electromechanical
    year
    1960
  2. By IPDB
    credit
    Harry Mabs — Design
    gameplay_feature
    Gameplay feature
    Slingshots
    Count
    2
    gameplay_feature
    Gameplay feature
    Gobble Holes
    Count
    1
    gameplay_feature
    Gameplay feature
    Standup Targets
    Count
    2
    gameplay_feature
    Gameplay feature
    Flippers
    Count
    2
    gameplay_feature
    Gameplay feature
    Passive Bumpers
    Count
    2
    gameplay_feature
    Gameplay feature
    Kick-Out Holes
    Count
    3
    ipdb_id
    2681
    manufacturer_model_identifier
    233
    month
    2
    player_count
    1
    reward_type
    Reward type
    Replay
    technology_generation
    Electromechanical
    theme
    Theme
    Cardsgambling
    year
    1960
  3. By Flipcommons Catalog
    corporate_entity
    Williams Electronic Manufacturing Corporation (1959-1967)
    credit
    Person
    Harry Mabs
    Role
    Design
    display_type
    Backglass Lights
    ipdb_id
    2681
    month
    2
    name
    21
    opdb_id
    G48W0-MDy3v
    player_count
    1
    slug
    21-2
    technology_generation
    Electromechanical
    theme
    Theme
    Gambling
    theme
    Theme
    Cards
    title
    21
    year
    1960