Nice RPM! It crosses over with VV's RPM-003 and shows that there is a second reverse that is EDS, that is probably what you have and why you cannot find any reverse markers.
VV-RPM-003. http://varietyvista.com/02a%20LC%20...5SRPM003.htm
VV-RPM-003. http://varietyvista.com/02a%20LC%20...5SRPM003.htm
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