Fifth mark (1955-1965) Shell Biscuit Jar (Degenhardt number D599) above at left (contrasted here with a later revised and simplified version of the design [Belleek number 232, above right], incorporated as part of the New Shell pattern collection during the sixth mark (third green) period some time between 1965 and 1980). Both examples here feature Belleek's cobb lustre finish, but early examples of the piece feature a bas relief coral base, elegantly undulating sides, and were offered in multiple finishes, including color tinted versions. This fifth mark example was purchased on eBay for $120 in March of 2002, while an example sporting the sixth mark (but before the revised and simplified form change) sold for $88.77 the following month.

A third version of the design (also from the sixth mark period, but between the original version and the radically redesigned third version) was produced in which the coral base was omitted. An example of this— probably the most rare of the three versions—sold on eBay in July of 2002 for USD $86.00 and is pictured below.

If you have an example in a finish besides cobb lustre and can provide good images, please feel free to contact Robert Ruiz so they can be documented here.

The example above on the right of the revised third version is sixth mark (1965-1980), and at the time of this writing is for sale for an astounding $467 from http://www.myantiquemall.com/.

Two views of the Fifth mark Shell Biscuit Jar (above), sporting the original shape. Compare to the sixth mark
version (below), a transitional style in which the coral base has been omitted on the way to a near
complete redesign geared both toward simplifying and "modernizing" (as well as cost cutting).

Shell Biscuit Jar, version two, in which the coral base has
been omitted, probably toward the mid- to late-1970s.