“Of particular note are prototypes and unique examples of Eterna and Porsche Design watches custom made for the Porsche family. The latter includes a fine 18 carat gold chronograph (above) made especially by Eterna (now owned by Porsche) and presented to Dr. Ferdinand Oliver Porsche for his 40th birthday, estimated at £4,000 - £6,000.” Porsche Family’s Personal Watch Collection to be Auctioned