Inspired by the cogs of the Lorenz cipher machine or ‘Tunny’ as it was referred to, this crochet hat has a vintage fair-isle look but only one colour is used at a time.


This pattern is part of The Bletchley Collection, a six piece collection for Eden Cottage Yarns’ Milburn range inspired by the WWII code breakers stationed at Bletchley Park.


S (M, L)
To fit: 51 (56, 61)cm / 20 (22,24)in
Finished brim: 48.5 (53.5, 58.5)cm / 19 (21, 23)in
Finished hat body: 66 (71, 76)cm / 26 (28, 30)in

Eden Cottage Yarns Milburn 4ply (4ply/Fingering weight; 85% Bluefaced Leicester Wool, 15% Silk; 200m / 218yds per 50g skein)
1 skein for each size in each of the following shades:
MC: Rust
CC1: Mustard
CC2: Night Sky

3.5mm (US E/4) crochet hook
3mm (US C/2-D/3) hook
Tapestry needle

Skills needed: Basic stitches, clusters, shells, working in BLO, working in the round.

Worked from the top down with colourwork patterning (one colour at a time) Brim is worked sideways.

Written in UK terminology with US conversion guide.

Technical editing by Rachel Atkinson, layout by Claire Devine, Photography by Victoria Magnus.
These patterns are also available in print at www.EdenCottageYarns.co.uk

PLEASE NOTE: there is currently an error in the pattern that the inch measurements have been listed as centimetres and the centimetre measurements are wrong. Please use the measurements above. We will correct the pattern as soon as possible.