Just curious is all....

I'm a first time cat owner, a couple weeks ago I adopted 6 year old Momo. The staff at the shelter say he's a domestic short hair, but I'm just curious if he has any characteristics of a particular breed. What made him stand out was that his coat is a silverly almost metallic grey and what I found out recently while playing with him that his tail actually is striped with brownish markings. 






***Bonus*** I just cracked up at this pic, he's like sticking his tongue out. 

He may have had a russian blue among hs ancestors.  Perhaps grandma.   Pretty boy!