Stamp on top:
- WP 51 Blue Ink X
- WP 51 Black Ink X
- W 52 Black/Brown Ink
Stamp on side of crown:
- W 55 Black Ink
- W 56 Black Ink
- W/57 short wide top
- W/57 taller narrower top (presumably later, as the W 56 has the short wide top)
ČTEŠ
Australian Telegraph Insulators
NezařaditelnéAustralian insulators from communications lines. There are several different kinds that look the same at a glance, but they are very different. This shows some of the many kinds of Australian insulator. There are pottery, porcelain, glass and even...