This pipe seems to be one of the first Kaywoodie Standard pipes: the series was introduced around 1950 and is still produced, but note the clover logo located on the top of the stem and the 4-hole stinger. That testifies undoubtedly that the pipe was made in the early 1950s the latest, before the company was puchased by S. M. Frank. A great piece of American pipe history!
The pipe marking is “KAYWOODIE \ Standard” (a bit hard ro read), “22”. The length is 14.4 cm (5.67″), bowl’s height is 4.4 cm (1.73″). External diameter of the bowl is 3.3 cm (1.3″), internal diameter is 1.9 cm (0.75″). The depth is 3.6 cm (1.42″) and this pipe weights 31 gr. Briar, vulcanite stem, aluminium air cooler. The bowl had a few dints carefully and reliably patched during the restoration.