What is a Bouvet-Jabloir?

Ernest Isenschmid Senior, barrel maker, often made reference in its workbooks to bouvets-jabloirs planes.

Thus, a bouvet-jabloir is a specific plane which was used in the manufacturing of oak barrels by hand.

This tool was used to dig the groove/channel inside barrels in order to place their top and bottom covers.

Nowadays, only couple of craftsmen coopers still use this type of plane worldwide.