I have been unable to identify this helicopter as it bears no marking I can discern. Any help would be most appreciated, by both myself and this website.

Transferred to US Marine Corps as 142434 in 1955.

Unfortunately no one survived the crash of Boeing 720 N724US, operating Northwest Orient flight 705, in the Everglades on 12 February 1963. Photo from: National Archives at College Park, Maryland

Originally 9598 with the Royal Canadian Air Force, this S-55 was seconded to Okanagan Helicopters as CF-JJL in February 1958 to build the Mid - Canada line radar sites in Western Canada. Struck off strength in 1964, it was sold to Autair Helicopter Services via Crown Assets Disposal Corporation in 1965.

Two new H-19As, Hop-A-Long and 52-3890 Whirl-O-Way, achieved the first Atlantic crossing by helicopter in July 1952. They finally reached their unit in Germany, the 9th Air Rescue Squadron at Wiesbaden, on 4 August. Photo from: National Archives at College Park, Maryland

Constructed as an H-19D in 1956 and entered service with the US Army as 56-4255. Civilianised in 1973. Joined Flight Research Inc of Starkville, Mississippi in 1989, based at the National Test Pilot School at Mojave, California.

A US Navy HO4S-3 helicopter at the Little America V base in 1956. It was flown by Cdr Waldron. Photo by: Jim Waldron / United States Antarctic Program

Of the five YH-19s, two were tested in Korea from 23 March 1951. They were 49-2014 and 49-2016. 49-2014 to N68634 in 1970. Photo from: US Air Force

144257 returns to helicopter deck of icebreaker USS Glacier, which was docked in Wellington. The icebreaker was a regular visitor to the city during the southern hemisphere summer. The helicopter crashed on February 12, 1959 following its return to Antarctica and was not repaired. Photo from: Evening Post/Alexander Turnbull Library

it is rather tight with space

Previously with US Air Force as 52-7536.

Carries false ID 14275, is in fact ex 56-1550.

Operated by Club Para-Commando which was a parachute club based in St-Simon, Quebec that flew two Sikorsky S-55s (S-55B/T C-GBHA and S-55B C-GBSC) as "jump ships" from a heliport beside Highway A20 that links Montreal and Quebec City. C-GBHA was imported in 1980 and C-GBSC in 1983, and both exported to the US in April 1985. No. 55912 was delivered to Grumman Aircraft in Feb. 1956 as N751A (for SAR use?) and flew in the 1967 film "Hurry Sundown." To Orlando Helicopter Airways (OHA) as N44689 and converted to a S-55B/T in the late 1970s. To OHA in 1985 as N44689 and sold to Whisperjet in 1993. WFU?

'Dropping supplies of 25 pounder field gun shells at a Commonwealth Division ammunition dump a few miles behind the line.' 51-14285 delivered to US Army aviation on 5 November 1952. To civil as N74899. Photo from: Imperial War Museums