Hippomobile (for "horse-drawn") is a good word. It's an adjective that seems most often to modify the word voiture (car, vehicle). The dictionary I normally consult says the adjective was coined in the 1890s, and probably based on the "new" term automobile. If I remember correctly, this parade was the finale when we spent the afternoon watching the spectacle équestre at the Haras du Pin in lower Normandy.
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