RCAF 1 OFU Ferry Service, This patch was issued either to members of 439 and 441 Squadrons flying F-86 Sabres during Operation LEAP FROG I in 1952 or returning Mk V Sabres to Canada in 1956. The Crest was manufactured by Crest Craft of Saskatoon and carries the back-stamp used in the early and mid 1950's.