St. Christopher, of course, is the patron saint of travellers.
Below a description and pic of a St. Christopher dashboard badge, circa 1950's. At the link posted below, there are two of these badges, the other from the 30's. By the design on yours, it's a safe bet to say it is much older.
Both of the badges at this link have holes to attach it to the dashboard... your's doesn't???
I trust this is a step in the right direction!
Badge description from link below:
>>>Good quality sterling silver and enamel dashboard mounted St. Christopher badge made in England for the French market. Dating from 1953
This small, attractive sterling badge is decorated with blue enamel, bears the image of St. Christopher surrounded by the caption, "Regarde St. Christophe -
Puis Va T'en Rassure" (Look at St. Christopher - Then go in Reassurance". The reverse is stamped, "Made in England", with the maker's mark, "T&S" and with a full English sterling silver hallmark corresponding to the year 1953. Overall length (including lugs) : 39mm. Very good condition.<<<