Originally Posted by Molokai Grandma
yes it has : H 499261 and above that onother gold plate :The Singer Manuf. Co. It also has many colors design all about it but I dont know if its MOP.
Your machine is a model 15 and it was allotted on July 2 1906 with 50,000 of them made on that run. So you are really close to the age of the machine with it being 104 years old.
As far as the decals you need to post a photo or two of it on here so we can look at it but I am willing to bet its a "Gingerbread Tiffany" design.
It would have to be a model 12 and made back in 1860's to 1870's to have the Mother of Pearl inlays.
Billy