Works in progress by a master wood carver were stolen from Fairlop Waters Country Park.
Sculptor Marshall Lambert said the theft took place overnight on Saturday, March 21 when there was a break-in at the works yard in the park.
As well as some of Marshall's unfinished carvings, a six-wheeled Gator truck and tools were also taken.
Marshall, from Natural Garden Sculptures, has shared pictures of the carvings - one of which is a dog and the other a bench surrounded by carved animals - in the hope someone might be able to identify the culprits.
Police carried out a forensic examination at the scene and enquiries are ongoing.
No arrests have been made.
Anyone with information is asked to call police on 101 or tweet @MetCC quoting 4405292/21. To remain anonymous contact Crimestoppers on 0800 555 111.
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