The raid, which netted 285 lots of paintings, furniture, porcelain and silver valued at £35,000, took place early on June 18.
A gang of six to eight thieves disabled the alarm and smashed through the fire door, using a lorry and four-wheel drive vehicle to escape.
The stolen items included a late 16th/early 17th century oak and iron bound chest, a 19th century Italian walnut and bone inlaid armchair and two silver cigarette boxes, one engraved Birmingham 1948 and the other Birmingham 1956.
A number of items came from the estate of Geoffrey Watling, the former president of Norwich City Football Club, who died last year aged 91.
The auctioneers cancelled the sale, offering the remaining lots on June 24.
Anyone with information can contact Yarmouth CID on 0845 456 4567.
Gang steals half the lots on night before sale
Horners Auctioneers in Acle, near Norwich lost half the lots for their auction when thieves broke in the night before the sale.
