This pattern is called V-neck with Panels in Patons #6348.

Measurements
To fit chest 22, 24, 26 in (56, 61, 66 cm)
Length at centre back (including neckband) 13, 14¾, 16½ in (33, 37, 42 cm)
Sleeve seam (adjustable) 9, 10¾, 12½ in (23, 27, 32 cm)

Materials
Patons Double Knitting or Patons Totem Double Crepe
4, 5, 5 X 50 g balls
Cable needle.