Merit Intercom Set by J & L Randall, Potters Bar. Copyright date © 1966.

They trotted this one out a few times...........

The hand sets are common to all Merit Intercom / Walkie-Talkie sets.

Anderson-wise there is  also a Supercar version.

The box lid & the insert follow a similar format.

The Joe 90 walkie-talkie set was made by Lone Star - which, design wise, was slightly more adventurous..

Note: Jeff & Scott are actually using the very same handsets on the box lid artwork.