The ornamental design for a metalwatchband with pin and block clasp, as shown and described.
FIG. 1 is a top plan view of a pair of metal watch band sections with pin
and block clasp showing my new design, wherein the watch case and stem are
shown in dashed lines for environmental purposes only and are not part of
the claimed design;
FIG. 2 is a side elevational view taken from the right side of FIG. 1;
FIG. 3 is an end view of the pin section thereof;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is an end view of the block clasp section thereof.