The six volume Automobile Girls Series were published in three formats. The first format has the uncommonly seen brown uncoated dust jackets.

Throughout the first format printings the front of the dust jacket remained unchanged. The spines and reverses however went through some modifications.

Front of the jacket

The spines:

This spine was published between early 1910 and later 1910. First edition for the first three books.

This spine was published between late 1910 and 1913. First edition for books #4-6.

This spine was published in early 1914 and perhaps early 1915.

The reverse of the jacket is really the key to the editions.

Note that the prices of the books are $1.00 and Volume 1 of the High School Girls Is “To Be Published Shortly”. This jacket is an early 1910 production and the first edition jacket reverse of the first three Automobile Girls Books.

This reverse goes with the first edition spine.

Note the differences in this, the second edition reverse, and the first. The books are now priced at 50 cents and the High School Girls book is not pending. This reverse goes with the second spine.

This reverse is the 1912-1913 reverse and the first edition for volumes 4 and 5.
It goes with the second spine.

This reverse is noted with 1914-1915 books and the second spine.
First edition reverse for Volume #6.

This jacket reverse has been seen with the second and third spines and was also published in the 1915 time frame.