Four Delft vases from a garniture late 18th century

Four Delft vases from a garniture late 18th century, two of ovoid form with covers, two of flared form, each painted in blue with a Chinese figure before a low fence in a garden setting, within a moulded panel, the covers surmounted with birds, blue Duijn marks for De Porceleyn Schotel factory, some damages and restoration, 33.5cm max. (6)