CINE film was stolen from a car parked in Lower Tub, Bushey.
The owner of the family film, which is 40 years old, is offering a reward for its recovery after it was taken from his green M-reg Jeep.
The theft took place between midnight and 8am on Monday, February 4.
The offenders smashed the rear window of the car and stole property behind the seats and at the front of the vehicle.
A yellow and grey Kodak tin containing the rolls of cine film, which featured the owner of the car and his family, was stolen, as well as a Nokia phone and £4 in cash.
Anyone with information can contact the Hatfield crime desk on 01707 638102.
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