From 1969, this is Simplicity 8299, A 'How To Sew' Pattern for Misses' size 12, bust size 34. It includes a tissue lesson-chart on "How to set in sleeves". The pattern is to make a blouse and an ascot.
The paper envelope is slightly yellowed and has a blue sticker, store stamps and some sticker residue on the front. Also there is a small tear on the back of the envelope. The tissue paper sewing pattern is factory folded and in great condition. The paper instruction sheet is slightly yellowed from age, but is still very readable/usable.