Hi, clo!
Expect to be maybe finding other things that you mum has secreted away. When my mother died 16 years ago, we found some of the most interesting (and some of them real memory-jerking) things in, and under, drawers, inside boxes in various cupboards, and various other places in the few weeks it took us to slowly empty out her apartment.
Amongst the strangest was seven or eight envelopes (some of them in the oddest of places) each containing exactly the amount of cash that she was receiving as her weekly old age pension at the time.
And every time we turned up something new would be time for the tears to start again. But usually they were good tears; because the memories were happy ones.