7 1/8" - 6 1/8" X 6 1/2" (181mm - 156mm X 165mm)

(front crown) L'ELECTRO VERRE 

(rear crown) HT 202                      

Picture courtesy Bob Berry

6 7/8" - 5 1/2" X 5 7/8" (170mm - 140mm X 150mm)

(front crown) FOLEMBRAY

(rear crown) BM-10             

Picture courtesy Michael Rioland

7 1/8" - 6 1/8" X 6 1/2" (170mm - 155mm X 163mm)

(front crown) L'ELECTRO VERRE

(rear crown) 210                        

Picture courtesy Michael Rioland