BARLING: Marylebone Guinea Grain (1817) (9mm) (with Case) Tobacco Pipe. The Marylebone Guinea Grain Rhodesian comes in its own case. (as seen in photos). MEASUREMENTS / OTHER DETAILS. CONDITION: NEW – UNSMOKED. Pipes of the Marylebone series are offered with no additional ornamentation except for the sterling silver lion’s head logo that is inlaid into the base of the acrylic stem. Length: 5.95 in. / 151.31 mm. Weight: 1.40 oz. / 39.69 g. Bowl Height: 1.86 in. / 47.24 mm. Chamber Depth: 1.49 in. / 37.85 mm. Chamber Diameter: 0.83 in. / 21.08 mm. Outside Diameter: 1.60 in. / 40.64 mm.