Crocheted Waistcoat

Hello everybody/ Hola a tod@s.
Today I want to explain to you how you can make this lovely Waistcoat in crochet.
The difficulty level is moderate.
Size to fit an adult female is 85 cm /34 in bust.
Materials:
Natura just cotton 50g. X4 balls ; crochet hook 4mm and one button of 2cm in diameter.
Pattern
With our 4mm hook,we make 170 ch.

Row 1: one dc in 2nd ch from our hook. * miss next 2 ch, and now 5 to in next ch.  Then miss 2 ch. 1 do in next ch; rep from* to end.
Row2; 3 ch( counts as first tr). 2 tr in first SC, * miss next 2 tr, 1 do in next tr, then 5 tr in next dc( between shell's) repeat from * ending last rep with 3 tr in last dc( instead of 5 tr) turn over.
Row3; make 1 chain( doesn't count as a stitch)
One dc in first tr.
5 tr in next dc ( between shells)
Miss next 2 tr,
1 dc in next tr.
Repeat from*, working last dc in top of 3 ch at end.
Repeat rows 2 and3 to form patt.
Work in shell pattern for 26 cm/10 in.
If You want to ask any questions do it in embartisanknitting@yahoo.com or in this blog..
Sell in embartisanknitting emb group in facebook.
Hugs to all.
Esther