Peter, as you've read by now, it's an interesting history of the Nipper image and its relationship to RCA, HMV, and JVC. Which brings up another point: that RCA's products were actually RCA-Victor brand. Today everybody just calls them RCA.

In the US, RCA seemed to go in spells of its use of Nipper in advertising. They would launch an ad campaign with him, and then he would seem to go away for years at a time. They did always use him on their record labels, and often used the horn and Nipper in a circle logo on products. I have wondered if they were restrained in their use because they didn't have the worldwide rights.

In the 1980's, after they were part of Thomson, they came out with a little Nipper named Chipper. I think JVC also used Chipper. Here's a US ad for RCA with them both in it: http://youtu.be/0wcM06jODb8

Here's another: http://youtu.be/aUNpQqp79FM