The jigsaw pieces were counted, and this puzzle appears to be complete, with 1540 pieces.  No attempt was made to assemble this puzzle.  The puzzle pieces and box are in great condition for their age.  The pieces are now in a resealable storage bag in the original box.

1977 Milton Bradley

1500 Series Super Challenge Puzzle

#4770 - Sun Valley, Idaho

Snowy Mountain Landscape Scene

The box says "1540 Pieces"

Finished Puzzle Size: 31" x 23 1/2" (78.7cm x 59.7cm)