Dimensions: 9.2 x 6.2 x 1.2 cm
Weight: 70 g
Female iron key (final perforation in circular form) with a double-lobed ring. The stem is cylindrical and reveals three decorative circles at the head end. The other end reveals an opening at the top of the stem, measuring 2 cm. The bit is flat (the opening or slit that runs through the key bit as far as the stem). The bit has a flattened conical pyramid cross-section.
This conical pyramid type of key bit was produced from the 16th century onwards.