Hi all. Sorry not to follow this up sooner but have just returned from a three-week vacation
.
Lots of interesting comments. I found this which is remarkably similar;
http://www.stewartsmilitaryantiques....9.archive.htm#
In answer to the comment about a T-section then yes it does look like a (waisted) T in cross-section behind the point region; ie it has a flat top to the blade.
No sign of "Klingenthal".
This blade is a little over 18" long ( a bit shorter than the one in the link above).
Any ideas about the name Spital? I didn't manage to trace this name on the web.