Jewellery stolen includes a diamond solitaire ring worth £25,000 and a bracelet with diamonds all the way around.
A White Cartier and Breitling watch were also taken during the robbery.
Nathan Rudy McDonald has been sentenced to nine years and eight months for his part in a robbery earlier this year.
Police have arrested a man in connection with an armed robbery in Shropshire.
Detectives investigating a violent armed robbery in Staffordshire are appealing for information.