Offered for sale an interesting and rare magnetic sundial signed S. Porter Fecit. March 17, 1825. Entered at Stations Hall. Wooden circular case with glass dome, velvet border. Wooden lid with expansion split. Paper label reading:
Okay, so far a simple Porter sundial…… However the compass card is made for the Far Eastern market! Chinese characters for the directions and hours. A bat motif in front of the gnomon. Never seen a Porter sundial like this before.
This invention was patented in 1824. Clever device since the user don\’t need to know the position of the North in order to read the correct time…..
Diameter: 54 mm
Now in the collection of the Whipple Museum of the History of Science.
Ask the Dealer
Kraker Antiek is a small, cozy and open-minded company in Amsterdam. Bert Kraker offers a collection of authentic, original, rare and quality objects.
With over 20 years of experience in the arts and antiques trade, one of my main specialties is antique scientific instruments. I formerly worked in association with Jaap Mennink, from whom I have learned to use all my senses actively in the trade.
I also work as a consultant for several international collectors and auction houses. And I am always interested in purchasing good quality (scientific) items, and evaluations and expertise offers.
Travelling extensively around the globe with a skilled and critical eye, Kraker Antiek offers an eclectic collection of scientific- and nautical instruments, natural history artefacts and collectors items. The collection is found on my website www.krakerantiek.nl and can be seen in my store at De Hallen in Amsterdam.
In order to find suitable objects, intensive desk- and field research is applied. Over the years I have acquired a comprehensive library about scientific instruments to this end. Expert views from colleagues are consulted if necessary to ensure the quality and authenticity of the stock.
Please contact me if you have any questions about any of my items offered on Fleaglass or visit www.krakerantiek.nl for a complete view on the stock.