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A4 printed pattern for Tunny by Joanne Scrace.

About the pattern

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.

Materials
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 3 shades:

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

Sizes
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

Gauge
22sts and 12 rows to 10cm (4in) in treble crochet using 3.5mm hook or size needed to achieve gauge, after blocking