Official Luthiers Forum!

"That is how I build my travel guitars, but with a port in the tail block that allows the neck to store inside the body. An added benefit is the action can be adjusted using washers or shims between the heel and body."

Cool, how about some pics please?

There ya go Hesh!
In the last picture you can see the "hollow" neck block that the peghead locks into when the guitar is in travel mode. Most of the time it would be kept (assembled) and played like any other guitar.

Pretty cool. Is that a bolt on bridge too?

Easy to get at inside from the back.

"Pretty cool. Is that a bolt on bridge too?"

It is.Glued and bolted. Three tiny light weight bolts are buried under the pearl dots. I wanted to keep the footprint of a normal sized bridge, but go pinless so the strings could be quickly removed. I kept them up on the tie block. Some will argue against the need for mechanical fasteners.

I just worked on an old soviet guitar with the exact same neck attachment. Here's a link: http://www.sankeyguitars.com/blog/2016/3/28/restoring-a-russian-7-string-guitar.html
I added a pivot strip so that the guitar would work properly. I assume that with the screw torqued down the heel was supposed to make full contact with the neck pocket, but the whole joint was an unsquare mess, and the heel block wood was so soft that the neck would creep upwards, with the bolt digging progressively upwards into the block. So I converted it into an adjustable joint. Dave Schramm uses something very similar.
That soviet guitar really was a cheap import though, I definitely would not condone converting a Hauser!

I have not found the interlocking pivot point to be necessary with the through heel bolt.
David Schramm is building Smallman style guitars which do not have a bolt through the heel and do need this feature to restrain the neck slipping upwards in the pocket.

One thing not visible in the travel guitar pictures - there is a metal reinforcing plate within the heel that the bolt passes through. It helps distribute the force over a wider area. The socket head cap screws and T nuts are easily sourced hardware stuff which can be easily replaced in the event of loss or failure. The guitar is designed for the traveling musician who may want a guitar that can fit in an airplanes overhead.

This is a wonderful bit of history. It should not be confused with the guitars that Hauser made his name on.
These early "Viennese" models are in the tradition of Stauffer, as were C. F. Martin's early models. They are beautifully built instruments. The craftsmanship is first rate. The design and scantlings were, well, sturdy. The sound is also sturdy. "This guitar is a cannon"? Maybe it is. That's not the reputation of Hauser's Viennese models. That's not my experience. Today, the pre-1925 Hausers sell for 10-25% of the price of his later "Spanish" models. Even after 1925 (Segovia), Hauser's "Viennese" models are available at a steep discount. And the "1937 Hauser--ex Segovia"? Also robustly built--top plate up to 3.2 mm.

One reason Segovia was interested in showing Hauser his Spanish guitar was that he heard some of the Viennese models played and believed Hauser built excellent instruments. As romantic guitars become better appreciated, his early instruments may gain in reputation.