Just as a follow-up here, I did some additional checking on some details and should correct one detail regarding the "Finest Scotch Whisky of Great Age" statement I made before....I do have a dated advertising references from 1929-1964 showing bottles with this description. (See attached)
Additionally, it should be noted that mnay of the pre-1950 Ads show bottles bearing no notation of content volume or alcohol strength...this is particularly true of many Scotch bottles I come across from the 1930's-1940's, as there had been some debating in the UK covernment about how such should be legal measured and labeled. Collectors of bottlings from the period between 1930-1960 will often see a variation (or absecence) of such measurements from their bottles, and often times a measurement in one format during the early 1930's, is replaced by another in the 1940's, then reappears in the 1950's.
What would be considered a "legal requirement" by todays laws, was not to be the case in every span of time...often such changes back & forth, created printing headaches for manufacturers, who simply printed no measurements at all, but later added smaller labels to meet whatever the current legal dictates were in effect at the time of bottling.
Walter C Hurst