Sigma by MARTIN Acoustic Guitar 1970 / 1971 vintage dreadnought

Used Sigma acoustic from Martin Guitars. Sigma was the lower priced offshoot of Martin, first manufactured in Japan in 1970. The original Martin factory built in 1850 became the "Sigma Import House!" This guitar needs some love or can be used for parts. See photos for detail. Some things to note: there is a crack/small indentation at the bottom front side. There is a crack at the neck heel in the back. There is a missing bridge peg top on the high E.  The label on the inside has mostly been removed. Needs new strings and general clean-up. I would love to keep it and fix it up, but I have my hands full with electrics at the moment. Based on the headstock logo, "SIGMA" in gold and Greek "S" in mother-of-pearl, this should be a 1970 or 1971 made in Japan model, possibly a first year DM-5. It also has a zero fret.
Please keep in mind, the guitar stand in the photos is NOT included, however, there is a case included with the guitar. I will ship the guitar in its case, with packing inside the case if need be, then packed into a double walled cardboard box, again with adequate packing materials.
From Vintage Guitars online:
"Long overlooked and relegated to an obscure corner of the collectible market, Sigma by Martin guitars have recently gained popularity among a new generation of collectors. If you’re one who has developed a taste for them (or other vintage Japanese brands), you likely know that Martin – as it readily admits – kept few notes regarding the Sigma line.

Thus, there is scant information on the brand – mostly anecdotes in far-flung strands of the internet; suppositional at least, unsubstantiated at best. In an attempt to remedy the situation, we offer this guide to the essential information on the enigmatic brand.

Gen I

Seeking to compete in the market for budget-grade instruments, in 1970, Martin began importing acoustic guitars made by subcontractors in Japan. The instruments employed economy-minded materials like laminated woods for their tops, sides, and back, but were generally well-constructed. The initial batches had a zero fret, covered truss-rod access, and bridges with a saddle “elevator.” Roughly 20 models were offered; the classical instruments had slot pegheads, while the acoustic flat-tops were characterized by a flat headstock reminiscent of a chef’s spatula (and now nicknamed as such), with the logo consisting of a gold decal of the word “Sigma” surmounted by the corresponding Greek letter (∑) in mother of pearl.

Some very early DR-7 and DM-5 batches had what collectors call an interior “type zero” white label with a black border and the Gen I logo printed with “Produced and distributed by C.F. Martin & Co., Nazareth, Pennsylvania, USA.” The model designation was usually hand-written in ink along the bottom border.

By late ’72, the zero fret was being phased out and the saddle made non-adjustable, but still perched on a fixed bridge… except on the 12-string DR-12-7 – a fact that plagued Martin sales reps, who were advised to “convert” dealers to the DM-12-5.

Beginning in ’73, certain lower-end models were manufactured in Korea, setting a pattern of multi-country/multi-manufacturers that continued throughout the run."

Thanks for looking... ask me any questions!