French School. Une fête a Strasbourg en 1779, early-mid 19th century

French School. Une fête a Strasbourg en 1779, early-mid 19th century, watercolour and gouache on card, depicting a picturesque scene with turreted buildings, sailing vessels on the river, and figures promenading, with one on horseback, lightly toned, indistinctly signed in red lower right, 10.4 x 21.3 cm (4 x 8.25 ins), manuscript title to mount, framed and glazed

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