Do any of you have knowledge of any Silver Smiths that worked in the "Occupied Japan" era?

I picked up a vase, I think it's silver but no specific silver hallmark on the bottom, however it does have a signing number on it, and an M in a tree shape...about 7 inches tall, floral design at base and top...I cannot post a picture but I could send one to one of you one to post if anyone could help???

Thanks

Suzan J