Some Leopold keyboards come with a stepped, centre-stemmed keycap with the legend "Control" instead of "Caps Lock". The area that you can press is 1.5u, not 1.25u like original Cherry/GMK stepped keys.
Pad-printed or blank Leopold keycap sets that included that key used to be available to buy separately, but I have not found them for some time. New Leopold keyboards don't have keys with pad-printing: it has been replaced with higher-quality dye-sub or double-shot moulding.