Vintage knitting pattern, 3 sets of Mittens & Bootees
Original yarn was Patons Beehive Baby Wool. The tension varies slightly depending on which set you choose but its between 7.5 sts and 8 sts per 1". You could try a 3 ply and work a tension piece, changing needles if necessary to achieve the correct tension.
There is no specific measurements given in this pattern only up to 6 months.
Circa 1950s
The spine has started to split top and bottom up to the staples, otherwise clean and readable.