Gary,
Aart de Pleijt was the son of Schoonhovense silversmith, his name pops up in some auction results
http://www.samh.nl/genealogie/bronnen-n ... n/1552931/
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Tasbeugel
Beschrijving: Zilveren tasbeugel gemaakt tot spiegel, Aart de Pleijt Schoonhoven 1892-1896, met gegraveerd floraal decor, 11x12 cm
Purse frame
Description: Silver purse frame made into mirror, Aart de Pleijt Schoonhoven 1892-1896, with engraved floral decoration, 11x12 cm
The father Willem de Pleijt is better known, Schoonhoven 1851-1878, his son probably worked for another silversmith and at a later stage started his own business, times were hard during those years
http://littel.genealogicus.nl/willem-de ... -1814-1878
An image Google search; willem de pleijt zilver will reveal more.
At the moment no access to my library but I will further check after 9th of December
Oel.