A very early alarm clock was called "LaSalle" in the late 1880s.
Then came the series of 6 clocks in cast cases often called the "Dura Case" clocks, made from 1931 - 1934.
Next was the 1935 very convex LaSalle 61-Q, and finally the 1954 cushion-shaped LaSalle.
When identifying a LaSalle style, observe the case shape and ignore the case and dial color, as the styles were made in various case and dial colors, as shown in the detail page for each style.
A trademark for La Salle was issued to Western Clock Co. on April 6, 1915. The registration contains the statement "The trade mark has been continuously used in our business since September 5, 1888."