Novelty exploding bread roll with its original box

Underneath this hollowed out roll is fitted an exploding cap mechanism. When the roll is picked up the cap explodes. The roll is very realistic because it is a real roll treated in some way to make it durable. Made in Germany. The box has on it ‘DRGM’ and ‘1254’. The roll has a sample label on it: #1254. This was clearly a sample sent to Davenports, but we do not know from which German supplier it came.