3 1/2" X 5 1/2" (89mm X 140mm)

(crown) V.W                   

{VW stands for VITRUM}

Picture courtesy Don Mecklenborg

3 1/2" X 5 1/2" (89mm X 140mm)

(front crown) T.1 S. HUTA     

(rear crown)  DUBECZNO N1

Picture Courtesy Bob Berry

3 1/2" X 5 1/2" (89mm X 140mm)

(crown) R in a circle       

{R stands for ROGOW}

Picture courtesy Don Mecklenborg

3 1/2" X 5 1/2" (89mm X 140mm)

No markings 

Picture courtesy Bob Berry

3 1/2" X 5 1/2" (89mm X 140mm)

(crown) HUTA ROGOW N.1.T-1-S 

Picture courtesy Bob Berry

3 1/2" X 5 1/2" (89mm X 140mm)

(front crown) HUTA            

(rear crown)  DUBECZNO

Picture Courtesy Dan Wagner

3 1/2" X 5 1/2" (89mm X 140mm)

(crown) VW                   

{VW stands for VITRUM}

Picture courtesy Tom Katonak

3 1/2" X 5 1/2" (89mm X 140mm)

(front crown) "JSN in a circle" 

(rear skirt) l                             

Picture courtesy Dan Wagner

3 1/2" X 5 1/2" (89mm X 140mm)

(front crown)        H.R.N.        

(rear crown) "PNT in an oval"

Picture courtesy Bob Berry

3 1/2" X 5 1/2" (89mm X 140mm)

No markings   

Picture courtesy Mike Green

3 1/2" X 5 1/2" (89mm X 140mm)

(crown) HL 

Picture courtesy Dan Wagner