Astrolabe: mounted reverse by unknown

Astrolabe: mounted reverse

unknown

Fine art poster

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  • 280gsm thick fine art print paper
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    • x cm excluding border ( x in)
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We use a 280gsm fine art paper and premium branded inks to create the perfect reproduction.

Our expertise and use of high-quality materials means that our print colours are independently verified to last between 100 and 200 years.

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All products are printed in the UK, using the latest digital presses and a giclée printmaking process.

We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.

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We print everything to order so delivery times may vary but all unframed prints are despatched within 2-4 days via courier or recorded mail.

Delivery to the UK is £5 for an unframed print of any size.

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Astrolabe: mounted reverse by unknown zoom

Astrolabe: mounted reverse

This instrument, signed 'IOANNES BOS . FECIT 1591', was identified as a fake in the 1950s. It falls among a batch of instruments of questionable authenticity that emerged on the market in Amsterdam between the World Wars from about 1925.

The throne and limb of this instrument are soldered to the mater. There is only one silver plate, engraved on one side only, with a stereographic projection for latitude 39├òÔòØ. There are multiple repetitions of some of the star names on the rete, which should have alerted potential buyers that this is not an authentic 16th century piece. On the back of the astrolabe is a combined scale for degrees and the zodiac and a calendar scale. The rest of the back is divided into two halves: the upper showing the arcs for the unequal hours and the lower containing a shadow square. The (fake) signature and date appear underneath this. The sights on the alidade are attached with pivots so that they can be folded flat.

  • Image reference: E5569-2

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