| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS Two preferred embodiments will now be described, by way of example, with reference to the accompanying drawings, in which: FIG. 1 is an elevation of a first embodiment, with the window shield and the dial removed, FIG. 2 is a partial section taken on the line II-II of FIG. 1, and FIG. 3 illustrates a second embodiment viewed in the same manner as in FIG. 1.
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