Complex sentence: In late 1962, the Kitmaster brand was sold by Rosebud Dolls to Airfix and it is thought the tools were destroyed in a fire, so no further kits were produced.
Split into simpler sentences: In late 1962, the Kitmaster brand was sold by its parent company (Rosebud Dolls) to Airfix. It is thought the tools were destroyed in a fire so no further kits were produced.