"Dutch School Early XIXth: Pair Of Fixed Under Glass Representing Skaters"
Dutch School of the early 19th century: Pair of fixed under glass 2 fixed under glass in oval shape in oval gilded wooden frames, representing skaters, one under the sun, the other in overcast weather The fixed are protected in their frame by curved glasses Annotation on the back of one In Dutch in Amsterdam 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato