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Heiloscope made by Ertel & Son, Munich. The helioscope is a telescope for viewing the sun without injury to the eyes, by means of blackened glass on mirrors that reflect only a part of ...
so yes...they were used at least until 1980 where I worked
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I also arrived on the last voyage of the S.S. Strathnaver to Australia,but I thought we arrived in Sydney in January. It would be appreciated if someone could s ...