Notes: 1st UK ed.
OCLC 31575811 (1992 microfilm)
OCLC 222374863, 752904489, 561598047: other records as 1924, uninformative
Publ date from Amazon UK and US as of 2017-01-09
-- both state ISBN-10 0224604392[*]
-- both show front cover images with Lofting illustration that matches the US ed. per Wikipedia, two different designs (three designs in all)
[*] for which one WorldCat library record states "(c)1924, 1975 ... Print book : Manuscript Archival Material",
OCLC 798637287
Not found 2017-01-12 in search of multiple 1924 newspapers for the full 4-word title (nor late 1923/1925 UK newspapers).
Two hits indicate a British ed. of this 1923 US book, at the usual Christmas holiday season:
The North-China Herald and Supreme Court & Consular Gazette 1924-09-06 p399: reprint of "the story of the Royal Mail of Fantippo from 'Dr. Dolittle's Post Office' ..." [long excerpt follows]
The Times of India 1924-11-09 p13 "Books Received" [content illegible here, which is common for this newspaper]
Search 1924 newspapers for abbreviated title 'Dr. Dolittle's Post Office' hits only the first of these two items.