* Delete 1 Part x77a Black String, Cord Thin (Undetermined Length)
* Add 2 Part x77ac75 Black String, Cord Thin 75cm
* Delete 1 Part 4006 Black Minifigure, Utensil Tool Spanner Wrench / Screwdriver (Extra)
* Delete 1 Part 3004 Trans-Clear Brick 1 x 2 (Extra)
* Change {2 to 1} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
* Change {3 to 4} Part Trans-Clear 3004 Brick 1 x 2
* Delete 1 Part x77a Black String, Cord Thin (Undetermined Length)
* Add 2 Part x77ac75 Black String, Cord Thin 75cm
* Delete 1 Part 4006 Black Minifigure, Utensil Tool Spanner Wrench / Screwdriver (Extra)
* Delete 1 Part 3004 Trans-Clear Brick 1 x 2 (Extra)
* Change {2 to 1} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
* Change {3 to 4} Part Trans-Clear 3004 Brick 1 x 2
Source: I own an NIB copy. There is a catalog from 1982
* Delete 1 Part x77a Black String, Cord Thin (Undetermined Length)
* Add 2 Part x77ac75 Black String, Cord Thin 75cm
* Delete 1 Part 4006 Black Minifigure, Utensil Tool Spanner Wrench / Screwdriver (Extra)
* Delete 1 Part 3004 Trans-Clear Brick 1 x 2 (Extra)
* Change {2 to 1} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
* Change {3 to 4} Part Trans-Clear 3004 Brick 1 x 2
Source: I own an NIB copy. There is a catalog from 1982
* Delete 1 Part x77a Black String, Cord Thin (Undetermined Length)
* Add 2 Part x77ac75 Black String, Cord Thin 75cm
* Delete 1 Part 4006 Black Minifigure, Utensil Tool Spanner Wrench / Screwdriver (Extra)
* Delete 1 Part 3004 Trans-Clear Brick 1 x 2 (Extra)
* Change {2 to 1} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
* Change {3 to 4} Part Trans-Clear 3004 Brick 1 x 2
Source: I own an NIB copy. There is a catalog from 1982
* Delete 1 Part x77a Black String, Cord Thin (Undetermined Length)
* Add 2 Part x77ac75 Black String, Cord Thin 75cm
* Delete 1 Part 4006 Black Minifigure, Utensil Tool Spanner Wrench / Screwdriver (Extra)
* Delete 1 Part 3004 Trans-Clear Brick 1 x 2 (Extra)
* Change {2 to 1} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
* Change {3 to 4} Part Trans-Clear 3004 Brick 1 x 2
Source: I own an NIB copy. There is a catalog from 1982
3749 Technic, Axle 1L with Pin without Friction Ridges with Round Hole Parts: Technic, Axle
and I only fount it used in one model.
The extra's were added by Viejos, based on sealed set contents from a Canadian
set.
After extra info I approved your requests, except removing the extra Wrench /
Screwdriver, which was definately included as extra. I also changed your second
string to extra, like you said, it is only used once.