2 3/4" X 4 1/2" (70mm X 114mm)

(front skirt) A4 / L'ELECTRO VERRE

(rear skirt)  82                                      

Picture courtesy Don Mecklenborg

2 5/8" X 4 3/8" (67mm X 111mm)

(Dome)

              2125

Picture courtesy Bob Berry

2 3/4" X 4 1/2" (70mm X 114mm)

(front skirt) ISOREX

(rear skirt)  247        

Picture courtesy Bob Berry

2 3/4" X 4 1/2" (70mm X 114mm)

(front skirt) ISOREX

(rear skirt)  12          

Picture courtesy Bob Berry

2 3/4" X 4 1/2" (70mm X 114mm)

(front skirt) L'ELECTRO VERRE

(rear skirt)  IB12                          

Picture courtesy Bob Berry