Well, I think you are probably SOL.
Back in the 1950's, that's the way they drew schematics & parts drawings.
The more recent ones with the almost 3-D drawings had not been invented yet back then by most firearms companies.
And since then, there has been no need to do it for the HD-Military, since that High Standard company went out of business, and the HD Model has been out of production for going on 60 years.
rc