Fisherman's 'Keps' are usually thought of as a Fair Isle hat, but they were knitting throughout the Shetland mainland as well. It is the same hat except that the patterns in the Shetland hats are all 'peerie' patterns. There are a couple of examples on display in the Shetland Museum, and I have, in the past, used one of these designs in a square hat.
I have now knitted this same design in a waistcoat, requested by a customer.
The shade of the colours are a little different but for natural and natural dyed colours they are never the same. Here it is, ready to be posted, and with a square hat to match.