Help with identifying age of Dewars?

My uncle was given a bottle from a friend and we believe it to be rather old bottle of Dewars. Its a smooth round bottle about 12" tall. Cream colored, metallic seal on top, with black lettering, but no label on the bottle itself. Seal reads from top, looking down at bottle John Dewars and Sons Ltd distillers Perth all in a circle, distillers in middle. On side of seal it reads Awarded 50 Medals with, again, John Dewars and Sons Ltd Perth on one side and on the opposite side of the seal, it has some sort of Royal seal, and reads below the seal, By Appointment. ON the bottom of the bottle there are two initials: N B. Otherwise it is a smooth, round bottle, with about a 4" neck that is sort of fluted.

It was found under the garage of a house on the national register in California, near Sacramento. We know nothing else of the origination of the bottle.

[Jojo]

Need photos! And, the label needs to be clear enough for us to read it.

I sent 5 pictures of the seal and bottom of bottle. Keep in mind we measured the bottle last night and it is just under 12" tall, and 3.2" in diameter around the bottle. Again, as you can see from the pictures I sent, the neck is a narrower, fluted neck, about 4" long. Hope we can gain some insight from you. Thanks for your work!!

[Jojo]

Is there a front label?

There is no label on the bottle. It was found hidden in a burlap bag under the garage of a very old house.

Please help with identification of this old bottle of Dewars.
Attached are some additional pictures.

Attached are some pictures of the entire bottle. Please help to identify.

Jojo,
I am attaching a photo of the bottle. Any guesses at this point? He also has a nice '51 bottle that is fairly valuable, so this is exciting stuff to look into - at least we think so : )