Examples:
This stop is uncommon under any name. No examples of Hautboy Clarion or Echo Clarion are known. Contributions welcome..
Octave Hautboy 4', Swell; Tewkesbury Abbey, Gloucestershire, England; various.
Octave Hautboy 4', Swell; Newry Non Subscribing Presbyterian Church, Newry, County Down, Northern Ireland; unknown 1806.
Octave Oboe 4', Choir, Solo; Town Hall, Sydney, New South Wales, Australia; Hill 1886.
Octave Oboe 4', Great-Solo, Choir-Swell; Convention Hall, Atlantic City, New Jersey, USA; Midmer-Losh.
Oboe Clarion 4', Orchestral; Auditorium, Ocean Grove, New Jersey, USA.
Oboe Clarion 4', Swell; First Congregational Church, Lagrange, Illinois, USA; Wotteler, Holtkamp & Sparling 1937.
Oboe Clarion 4', Swell; Claremont College, Claremont, California, USA; Estey 1931. (Unified to 16' & 8'.)
Oboe Clarion 4', Pedal; St. Cecilia's Roman Catholic Church, Hastings, Nebraska, USA; Quimby 1996. (Extension of 8' Swell Oboe.)