This is a Slingerland Songster 881-H Hawaiian guitar from the 1930s. It has a raised bone nut which I believe looks like a good quality replacement, not the original nut (which was a standard player nut with a metal string riser). You don't get to see too many of these and this is the rare model that has the curve built into the back for your leg when playing lap style. It has the original, fully rounded neck and could easily be converted to a standard guitar. It is missing the original screwed on pick guard.
I only did one thing to this guitar. I replaced a 5" missing section of binding on the lower part of the top near the strap button. You can see before and after shots above. Everything else is in fine working condition. This Hawaiian style slide guitar is being sold for the estate of a friend who passed last year. He loved Hawaiian music and had a fine collection of modern and vintage ukes and slide guitars. I'll be listing more soon. He had a great eye and always took care of his instruments and this one is no exception. This guitar was well cared for but has a few scuffs and the sort of light play ware you'd expect for a 90+ year old guitar. It does not come with a case but will be well packed and insured.
In the 1930s, Slingerland offered a wide variety of models under the Songster name: archtop guitars, solidbody electric Spanish and lap steel guitars, mandolins, ukuleles and banjos. While not really a brand in its own right, Songster instruments were representative of a certain middle level of quality. Like many Slingerland guitars, this Songster 881-H flat-top was built by Regal. Regal is mostly remembered for cheap guitars, which they turned out in enormous numbers, but they also produced some fairly high-end instruments in their custom shop (which occupied an entire floor of the Regal factory). This is a good example of a mid- to high-grade Regal from the company’s later years.
As with most Slingerland guitars, there are numerous variations known to exist. Pickguards were sometimes elevated and sometimes screwed to the top (now gone from this one), fret markers varied, and some bodies even featured an inward curve in the back to better accommodate the player’s leg (this one does have this feature). Although a square neck would have saved the cost of carving, all were fitted with a conventional round neck. All were also featured with conventional low nuts and given metal nut extenders to set them up for Hawaiian-style playing (this one has had the original nut replaced with a higher bone nut for Hawaiian style playing). It’s easy to suspect that the model was originally designed to be a Spanish guitar but was converted for lap-style playing shortly before shipment. In fact, many of this model have been converted back for Spanish-style playing.
The Slingerland catalog describes the 881-H as a companion to the Songster archtop Spanish and tenor models. As with the archtops, the Hawaiian model has a solid spruce top and 3-ply maple back and sides. 
This is a rare example of a Slingerland 881-H in great shape! A rare round neck raised nut guitar. I only found one other example online, one currently for sale in Germany for $1690.00. I spoke with DK Kolars, the man behind the Slingerland Guitars web site, and he suggested asking between $700.00 and $750.00 for this guitar. In the interests of a quick sale, I'm asking $650.00.