Hi Mike.
Can i have your e-mail adress. I Will try to send more pictured here, but i i cant, i Will send Them on e-mail.
I dont know anything abouth concertina, so i dont know the tuning.
Its ben several years sind Its been serviced.
I took IT to a harmonica specialist yesterday. Hej said, that the Sound was good, but their was one key/botton theire had to be tuned.
I can only insert one pictured in here.
Peter