Any Idea On The Age Of These Bottles?

[firemanke]

My mother received these from a client who asked her to clean out her deceased husbands bar... He apparently passed a long time ago and we have no clue as to how old any of it is.

As i cannot add attachments yet, I will describe them as best I can.

Two Johnnie Walker 750 Ml bottles. Both have the 4/5 quart measurement on the middle label. Bottle A has the 12 year old lower label and the crest for the upper label. The bottom of the bottle has "Liquor bottle scotland" and 68 984 on it. Bottle B has the crest on the lower label and "Johnnie Walker" Black label for the upper label. On the bottom it has
SC813
71mm 750ml
Liquor BOttle Scotland
JW
333 E (backwards) U3

One Dewars White Label Half Gallon with the Flip top pourer. Has a Red IRS Tax Paid stamp across the top with Schenley Import Company NY NY. and 283166394 on it. It states 50 Gold medals and Prizes, and emblems with dates ranging from 1886 to 1930. The bottom has John Dewar & SOns LTD. Perth Scotland. US Des Pat 202931 curved around the outside and in the middle:
Z 8666
8(?) 7
U G B

As a side note one of the JW bottle B has a small amount of particles in it that quickly settle to the bottom if disturbed, does this affect it's drinkability? I know that it does not age in the bottle but I am rather curious to try some from a different time period and would like to know what exactly I'm trying. Thanks in advance!

PS. when allowed I will post pics.