The maker is: Van Kempen in Voorschoten. The Van Kempen-factory was one of the biggest silver manufactures of the Netherlands. If you have a close look at the helmet of the Minerva-head you see the letter C, which stands for the assay-office of The Hague (just a couple of miles from Voorschoten).
Van Kempen started his factory in Utrecht, but when he wanted to innovate and use larger steam-engines he wasn't allowed to do so in the city. He therefore bought an estate and built a steam-driven silver factory in the back garden. This factory existed until the 80's of the 20th century. Although nothing remained of what used to be a silversmithing business, you will still find historical information from its successors at: http://www.royalvkb.com/sitemap/index.asp?page=5&submenu=2
Best regards,
Janjaap Luijt

The Dutch spoon, shown by Rene Watkins in your December newsletter (32), was made in 1867 by the well known firm VAN KEMPEN (founded in the end of the 18th century and still in operation).
Noël Lommers

The maker of the Renee Watkins spoons was van Kempen of Voorschoten, active between 1858 and 1924.
Mark 10858 in Meestertekens van Nederlandse Goud-en Zilversmeden 1814-1963.
ISBN 90 1205247 5.
Regards,
Fred.

...What I can provide is more information about the Argonne Trophy hallmark.
One good reference for American hallmarks is Kovel's American Silver Marks by Ralph and Terry Kovel. The mark in question hallmark can be found there. However, in this book the mark is not very clear.
Attached are two JPGs from page 42 of American Silver Manufacturers by Dorothy T. Rainwater. My copy is an old one, published in 1966. As you'll see by the marks shown, we can provide Mr. Rattenbury with certainty that the Argonne Trophy WAS manufactured by the William B. Durgin Co. This Concord, New Hampshire, company was active from about 1853.
The company was purchased by Gorham Corporation in 1905, and the plant was moved to Gorham's facility in Providence, Rhode Island, in 1931.
Since this trophy was presented in 1922, it is most probable that it was made at Durgin's Concord, NH, facility.. Bill Belisle

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