Kuh85, that is such an awesome coin, I've never see any Canadian silver dollar worn that bad, amazing! I remember seeing an auction years ago for a set of Canadian silver dollars from the years 1935-1967.
Why this set was soo unique is because it was owned by Brian Cornwall, owner of I.C.C.S.
It was about thirty years ago ago B. Cornwall wanted to complete a set of Canadian silver dollars from the years mentioned above, however, the only criteria was that they had to be the most "worn" out he could find, date must be readable and they must have only natural wear without any notable gouges/scratches/cleaning.
A few years ago,Cornwall's completed set made up of similar pieces to your 1949 dollar sold for over $4,000.00. You can imagine a man that can afford and easily find MS-66/67 Canadian silver dollars right across the board for every year conceivable, chose the reverse.
He stated in an article I once read in The Canadian Coin News that it was the "greatest challenge of his Numismatic Carreer!"