We know that Proll-O-Tone did not limit itself to making toy saxophones in only toy-like colours. As we saw in the gold coloured and above, some of these toy horns were coloured like the real horns they were small copies of.
I happened to come this interesting ad in the Google News Archives. It is from the October 28, 1971 edition of the Toledo Blade. Apparently you could get these Proll-O-Tone toy horns for under a buck.