Simplicity 8925 vintage sewing pattern ©1971.

Misses' Skirt in Three Lengths with Detachable Suspenders:

The mini-skirt V. 1 and the midi-skirt V. 2 have waistband and front button closing. V. 1 has patch pockets with self flaps. Mini-skirt V. 3 with button trimmed flaps has detachable suspenders buttoned in front and back. V. 3 and 4 with empire waistline have back zipper closing. Maxi-skirt V. 4 with front slit has lacing and button trim. 

Size   14:

Waist 27 inches / 69 cm

Hip    38 inches / 97 cm

Pattern is printed, partly cut and checked complete. Envelope is intact, with wear, spotting, store stamp and handwriting on the front. 

More '70s patterns here:

http://allthepreciousthings.com/collections/1970s