In the late-80s (Central Casino; Mar del Plata, Argentina, had a total of 135 wheels in 3 locations). Other casinos with 14, 18 and 25 wheels had series of Roulettes numbered: A1, A2, A3 thru; B1, B2, B3 thru, and so on. I have scans of Roulettes from Casinos Argentinos and from Tucumen showing these series.

JB