GTK Duplicating Co.
List of Customers
- GoodTimes Entertainment
- Kids Klassics
- GTK Home Video
- Unlimited Energy
- Sofa Entertainment (2000-2005)
- HGV Video Productions (Canada) (1989-1998)
How to Tell
- Most tapes duplicated by GTK Duplicating Co. were duplicated on cassettes supplied by Polaroid Corporation and manufactured in either Hong Kong or Taiwan.
- Post-1986 tapes have a black screen test pattern with the normal-pitched looping beep-tone.
- Pre-1997 tapes have the record tab intact, while post-1997 tapes omitted it.
- Certain 1997-2005 tapes were duplicated on cassettes manufactured in Korea.