The R38 series are rounded rings, divided into thirds and inlaid with wood. As such this design gives the wood the most protection, especially as it is made from palladium which is a very strong precious metal.
At 8mm, this is a fairly wide band that showcases a piece of cocobolo. It is a UK size S.
This ring is one of the sample pieces that have been at the workshop and are now looking for their forever home.