5"- 4" - 3 1/4" X 6" (125mm - 101mm - 82mm X 151mm)

(top skirt inkstamp) NZI 9037

                                M1022-17

{New Zealand Insulators}

Picture courtesy David Kresz

4 7/8"- 4" - 3 1/4" X 5 7/8" (122mm - 101mm - 82mm X 148mm)

(ear top ink stamp) 750 SILENT

{New Zealand Insulators}

Picture courtesy Bob Berry