2 3/8" X 2 3/4" (58mm X 67mm)

(dome ink-stamp) P.T.D.

{Post and Telegraph Department}

{Maker unknown}

Picture courtesy Bob Scafe

2 3/8" X 2 3/4" (58mm X 67mm)

(dome ink-stamp) P.T.V.

{Post and Telegraph Central Board (P.T.V.)}

{Maker unknown}

Picture courtesy Bob Scafe