Highlight for locations.
Hope this helps those who get a bit stuck.
Since some are in some rather peculiar areas.
Code:691.0, 492.3, 72.8 - Behind the wall. 611.8, 490.8, 84.2 - On the roof, in the corner. 638.7, 554.3, 84.4 - On the overhang of the door. 681.5, 574.7, 73.5 - On top of the antique building. 685.3, 578.2, 66.8 - To the left of the antique building door. 763.0, 690.3, 65.9 - On the Equipment Emporium roof, to the right of the Whompahs.