3 vintage Timex wathes appeared in the autumn/winter 1978 Smurf Land catalog. Judging by the pricing these were available in 2 sizes. This is confirmed in the later 1979 catalogs showing Mr Smurf (Yellow dial) being the smaller size so likely a Petite with Chef (Orange dial) and Striker (pink dial) being sprite sized.
Reference http://www.thecursedcountry.com/Nationalbenzole.html