Rene,If you're thinking of the original 14K Piping Rocks, they're scarce but not as rare as the other enamel bezel models (Coronado and Spur). In the 1928 series there were 3,812 made in yellow gold, 5,985 in white gold, 2 in green gold, 28 in 18K yellow gold, and 9 in platinum. It was reintroduced in 1948 in a slightly redesigned case with a different movement and newly-styled dial and hands. There are no surviving production records for this version but it is slightly scarcer than the 1928 style. Some collectors prefer the 1948 Piping Rock because it is has sturdier lugs that hold up better to regular wear.