Thieves raided changing rooms during a derby match between football clubs from Blofield and Acle.
Police are appealing for information after belongings were stolen the Margaret Harker Hall & Memorial Ground in Blofield.
The incident happened between 1.30pm and 4.45pm on Saturday, March 10, at the Yarmouth Road ground.
Thieves entered the referee's changing room and stole a wallet which contained cash and cards and a gold watch with a brown leather strap.
Police said the match was well attended by spectators, and would like to hear from anyone who may have witnessed the incident or noticed people acting suspiciously.
Anyone with information should contact PC Andrew Jones at Sprowston Police Station on 101 or call Crimestoppers anonymously on 0800 555 111.
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