Thank you for contacting Mearto and I apologize for the delay. This is a Chinese crackle glazed ewer in the shape of a double gourd. There are no markings on the base. It resembles Guan ware pieces made in the Southern Song era (1127-1279) in shape and glaze. My valuation is based on authenticity.

I recommend sending photos to a house such as Christie’s for further confirmation. Many of the links below are to Song pieces they’ve sold. Please let me know if I can be of further assistance.

Christie’s page to submit photos:
https://bit.ly/3fQFcJ6

About Song dynasty ceramics, see Guan ware:
https://www.britannica.com/art/pottery/Song-dynasty-960-1279-ce

Some Southern Song pieces and hammer prices:

$520, ewer, 8”
https://www.christies.com/lot/lot-4050254

$684, 2 double gourd ewers
https://www.christies.com/lot/lot-1942380

$882, Northern Song ewer
https://www.liveauctioneers.com/en-gb/item/16756278_northern-song-dynasty-960-1279-ad-qingbai

$900, ewer
https://www.liveauctioneers.com/en-gb/item/107594734_a-ge-ware-double-gourds-ewer-song-dynasty
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$1758, ewer and vase
https://www.christies.com/lot/lot-4991026

$3000, ewer, 7”
https://www.christies.com/lot/lot-6091839

$4844, urn, 11”
https://www.christies.com/lot/lot-6230665

$5040, double gourd ewer
https://www.liveauctioneers.com/en-gb/item/26966330_a-white-glazed-double-gourd-ewer

$6875, 6”, double gourd ewer
https://onlineonly.christies.com/s/chinese-ceramics-works-art/rare-small-qingbai-double-gourd-ewer-53/90517

$209,000, 4” censer
https://www.christies.com/lot/lot-a-guan-type-longquan-tripod-censer-southern-song-6019228/?from=salesummary&intObjectID=6019228&lid=1

$605,000, 10” vase
https://www.christies.com/lot/lot-a-longquan-celadon-twin-phoenix-mallet-vase-southern-6019227/?from=salesummary&intObjectID=6019227&lid=1