Yugoslavia, Kingdom. A Rare 1931 Serbian Kosovo Cultural-National Calendar visually-hidden plus a hook and eye

plus a hook and eye closure to secure the two ends of the sash together at the bottom end

2) A 1992 Willingen 30th International Meeting of U-Boot Commanders badge

then transferred to "A" Division in Ottawa on May 1st

while the other three are unmarked on the reverse

Yugoslavia, Kingdom. A Rare 1931 Serbian Kosovo Cultural-National Calendar visually-hidden plus a hook and eyeConstructed of off white paper with multi coloured ink, the obverse bearing a central flag of the Kingdom of Yugoslavia, topped by a date of 1931 flanked by a Serbian Cyrillic inscription of (SERBIAN KOSOVO), and situated beneath a banner headline of (CULTURAL NATIONAL CALENDAR), surrounded by black and white portraits of key figures, including King Alexander I, Patriarch Varnava of the Serbian Orthodox Church, and ministers of the elected government,