Characterised by the angular rim at the wire groove. Due to the inconsistency in these early Firebrick bells, it is likely that specimens nowadays deemed 'U-1502' and 'U-1503' are indeed from the same batch.
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JE LEEST
Australian Telegraph Insulators
OverigAustralian 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...
