There are two variants of the 3 pint design, with and without dog. There is also a minor variant in the family group. When there is a dog the family group has a hatched base. Otherwise it has a plain base. Click for comparison (3PINTA). "Without dog" have been recorded from the earliest unmarked type right up to Royal Doulton. "With dog" from unmarked to Doulton Lambeth in oval. The early unmarked jug has other early features. Click for comparison of earliest (above) against later (below) (3PINTB).