Tin Fanny (old taxicab)

“Tin fanny—Old taxicab” was included in a glossary of taxi slang issued by the New York Taxicab Chamber of Commerce, and printed in the Springfield (MA) Daily Republican on January 7, 1933. The taxi term is of historical interest today.
 
 
Newspapers.com
7 January 1933, Springfield (MA) Daily Republican, “Taxi Slang ‘Englished’ For Those Ignorant of Drivers’ Technical Talk,” pg. 6, col. 5:
New York, Jan. 6—(AP)—The hackmen, it developed today, take English, too, for a ride.
 
A glossary of taxi slang issued by the New York Taxicab Chamber of Commerce contains the following definitions of the argot:—
(...)
Tin fanny—Old taxicab.
 
Newspapers.com
5 October 1936, Stamford (CT) Advocate, “In New York” by George Ross, pg. 6, col. 6:
The decrepit, wheezing cabs which rattle along the city’s streets are known as “tin fannys.”