Hello pedigree,
Welcome to the TNet and thanks for showing us some images of your bottle.
I believe the "D in a diamond" mark, in this bottle's case was a Dominion predecessor, Diamond Glass Co.
"Diamond with a “D” inside…………….Diamond Glass Company/Dominion Glass Company, Montreal, Quebec, Canada. See “D in a diamond” entry."
GLASS MANUFACTURERS' MARKS ON BOTTLES & OTHER GLASSWARE~~ PAGE TWO
I see no "Federal Law Forbids…" language on your bottle. The spiderweb design was a popular pre Prohibition motif. I see the seals are broken. Is there any date information on the remnants? How about a better view(s) of the cap? What is that hanging tab?
View attachment 924596
"Gene Joo of Burlington NC with his amazing display of spider web whiskey flasks."
Southeast Bottle Club - July/August 2003 Newsletter
I don't think you have too worry too much about a high value on this. Though you might check with
Wanted : Old and Rare Whiskies and Other Spirits : The Whisky Exchange
"Canadian whiskies are quite abundant, but because they are blended they tend not to change from one year to the next. This reduces the value significantly since the perception is that something bottles in 1951 would taste the same as a 2005 bottling. That is the goal of blending, a consistent flavour from one generation to the next. So a bottle of 1974 Seagrams VO might not be worth anything, but perhaps a bottle of Crown Royal from the 1940's or very early 1950's might have some value. Again, it is not going to fetch you a lot of money but you may get double the going rate for a current bottle of Crown Royal. Extinct Canadian whisky, like Canadian Masterpiece Whisky, may be worth more but the trouble is finding a buyer."
Old Unopened Bottles of Whiskey :: Art of Drink