Vintage Early 1900's German Concertina Accordion W&S Leipzig NICE prewar

Description

Up for sale is a beautiful antique pictured.  I did get this locally from a local estae in Richmond.  The man had a lot of civial war and WW 2 items with the estate.
As you can see from this item it has been used.  I am by no means an experert on this item, I know nothing on how to play it or to tell if it is in tune.
But just by being around antiques over the years I can tell you a lot about it.  The condition is solid, it does not appear to have any water damage or odor, or from a smokers home.  I was able to see if it was working by "playing it"  figured out that you had to press the keys then compress it to make a sound that sounded like it should when you don't know how to play it like me.
I could tell that the compression of the air sounded tight, it did not seem like there were holes in the accordion part.  In inspecting the overall condition there is wear on it, it was a piece that was used often which gives it more character and patina.  They does not seem to be any repair that I could tell on the wood or metal parts- I am not a train eye on instruments, but sometimes you can tell repairs.
I have included many pictures and the item is as pictured, please look at them closely and e-mail me with any questions.  Shipped the next business day after the auction closes and payment is made.  Thank you for looking and the description below is what I had found online on this item.  - Andy
For sale is an early 1900s working W. & S. LEIPZIG Push Button Accordeon or Accordion from Leipzig, Germany. The company name is embossed on each of the eight metal corner braces. This instrument is a very attractive example of a 1-row Vienna-style button accordion (or melodeon, in some uses of that word). Given the English-language labeling, the instrument would have been manufactured for export. This vintage button accordion has one row with 10 buttons on the key treble side. The accordion has one row with 4 pearlized buttons on the bass side with a single air valve button for expanding or contracting the bellows without sounding a note. The instrument is marked with a German Patent No. D.R.G.M. 362041. D.R.G.M. registration was introduced 1891 and used until 1949, even during Allied occupation. The accordion's leather harness is intact. When compressed, the accordion measures about 10 1/2 inches, by 11 inches, by 6 inches.
This accordion is diatonic (single scale) with a single-action (bisonoric) keyboard, i.e. each button produces two notes: one when the bellows are pressed or pushed (closed) and another when the bellows are drawn or pulled (opened). Each button produces a different note on the push and the draw of the bellows. In this respect it operates like a harmonica.
The treble casing, the boxy part of the accordion attached to the buttons, contains the reed block. The bass side, opposite side of the bellows from the button side, also uses reed blocks operated by a set of rods and levers.  The life of the accordion is the bellows - the "lung" of the instrument that makes air flow through the reeds. Air is moved through the reed blocks by the action of the bellows, which is the middle part of the accordion that can expand and contract to push and pull air through the reeds. When the bellows are stretched or contracted, the reeds make sound. To move bellows without making sounds from the reeds, one uses a "air button lever" on the side of the instrument. Bellowing action controls dynamics and articulation: quick, forceful bellowing produces loud sounds, slow gentle bellowing makes soft sounds.