The 'Allenbury' Foods for infants : The 'Allenburys' Diet for adults : May 1906.
The pattern
This still sits in the public-domain pool. No pattern name yet.
Why it works
This edition emphasized adult invalid recovery, showing how pre-digested milk solids nourished patients unable to process solid meals. Broadening the brand from infant feeding to geriatric and postoperative care opened a massive secondary demographic.
Steal this when
Steal this when expanding a well-known niche product into an adjacent demographic with identical physiological needs.