Okay, got some great stuff to go on. Bookmarked some song books and I am leaning towards a Hohner D40. Doesn't have steller reviews but it's about the best I can afford and is marked down considerably on Musicians Friend. (http://www.musiciansfriend.com/folk-traditional-instruments/hohner-d40-concertina)
My apologies to Dan if he was offended by my poor choice in words. I did read what you sent. Very good information indeed. If I go threw with this venture I intend to read all the chapters for that matter.
I should explain, however, that when I was talking about "early use" I meant earlier in the age of sail. The other ship I volunteer with is a replica of the Lady Washington, the first American ship to reach the Pacific Northwest. The original Lady Washington sailed from 1787 to 1797. Far as my research has led me, that means she foundered in the Phillipeans about thirty years before the concertina was even invented. (Wikkipedia was a sorce on this so by all means correct me if I'm wrong!) Seems clear to me that the image of a 19th century sailor playing a concertina was very much spot on. But the Disney/Hollywood image of a happy pirate playing his concertina (golden age of piracy, 1650s to 1720s) onboard ship just didn't add up with the concertinas very existance.
Good news is the Hawaiian Chieftain which I normally volunteer on is an 1850s style hull with 1890s style rigging and definately NOT a pirate ship as I explain to guests all day long. That puts her not only in the right historical time period for the concertina, but smack dab in the middle of it's heyday according to Dan's research.