His Master's Voice" - Victor/Victrola trademark ad (Saturday Evening Post, Dec 18 1920)
The pattern
This still is filed under Mark as compressed claim.
Define
The mark itself is the sentence: a monogram, a seal, a device that already means the claim.
Mechanism
Compression. Years of use, or a very sharp first use, load the device so it can appear without copy.
Verdict
The mark is already loaded, or we will spend to load it
Why it works
The whole fidelity argument is delegated to one image and never argued in words - a dog fooled by a recording is a stronger claim of realism than any adjective, and it is unfalsifiable because the viewer completes it himself. The slogan is set in quotation marks, which frames it as the dog's own caption and keeps the picture doing the talking. The copy then spends its few words not on the product but on anti-counterfeit instruction, converting a trademark into a two-step behaviour the buyer can perform in the shop, which is what makes the mark stick as a purchase rule rather than decoration.
Steal this when
You own a distinctive mark and the real commercial problem is imitators, not persuasion. Let a single emotionally loaded image carry the product claim, and spend the copy entirely on teaching the buyer where to physically check for your mark.