5 7/8" X 4 3/8" (143mm X 107mm)

 (top skirt inkstamp) 4-86 M1456

{NZI}

Picture courtesy Craig Polkinghorne

5 3/4" X 4 1/4" (140mm X 103mm)

 (top inkstamp)                 NZI

                                            MADE IN

                                             NEW ZEALAND

                                          1970

                                          SILENT

{NZI}

Picture courtesy Craig Polkinghorne

5 3/4" X 4 3/8" (140mm X 105mm)

 (top skirt inkstamp)            NZI

                                            MADE IN

                                             NEW ZEALAND

                                          1970

{NZI}

Picture courtesy Craig Polkinghorne

5 7/8" X 4 3/8" (142mm X 107mm)

 (top skirt inkstamp)   4-85 M1456

{NZI}

Picture courtesy Craig Polkinghorne

5 3/4" X 4 3/8" (140mm X 105mm)

 (top skirt inkstamp)   NEW ZEALAND

{NZI}

Picture courtesy Craig Polkinghorne