I do believe my Original's wheels have the same sort of angle inward (known as camber angle). As George said, it is designed that way to allow easier and better steering.
The Chassis service manual for my Original has a whole section talking about it too 
Screenshot 2021-01-04 at 09.35.06.jpg
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'70 107 with k301 engine swap
'71 106 with 38" deck
'70 147 R with factory replacement k321, 42" deck
'61 Original with 38" timed deck
'63 70 "pinkie"
1863 with 54" deck
'46 Farmall H, '50 Farmall Cub
105 x2 (parts)
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