I remember signing for these from stores, for NAVEXs in the Bulldog - as close to a Navaid as it came!
The pre-avionic upgrade Bulldog didn't have a stopwatch fitted, although we had a good Monte Carlo stopwatch after that Mod. - very firmly attached to the instrument panel.
Pre-Mod., the custodian of our stopwatches even expected fellow QFIs to sign them out from him, the miserable git. We took rather a dim view of this and a chum unscrewed his desk drawer assembly wherein he kept the watches from the desk top. So, if you needed a stopwatch, you just lifted up the corner of his desk and grabbed one from the exposed drawer - he never did find out!