Looking for a Timer / Backuhr has also more than one hour duration, we stumbled upon this Timer. There is no problem for a few minutes up to several hours to set a time. The operation is easy (even with the two time slots) and the device does what it should.
We are satisfied and I have already heard of labs that use for simple applications this clock as a stopwatch, because it is quite flexible. I can yet make no statement about the accuracy and the durability.