Maryhaddon

I have a concertina with a Lachenal sticker attached as well as a Wheatstone tag on the box. It came with my husband's grandfather from Scotland in 1917. It has 48 bone buttons. I have photos but could not upload them. Can someone advise me on the age of the concertina. The Wheatstone address places the age before 1915. There is also a serial #59055. Thanks for any info. Mary Haddon