![](https://coimages.sciencemuseumgroup.org.uk/232/49/large_thumbnail_d051093.jpg)
Excell M2 Pocketphone, 1987.
1987
1987
1990-1991
1989
2000-100 BCE
1990s
1985
1990
1988
1989
2000-100
1986
1990-1991
1986
1985
1987
1986
1985
1989
1985
1992
1985
1992
1989
1990s
1985-1988
1985
1986 (replica); 1501-1600 (original)
1989
1985
1987
1992
1987
1988
1988-1992
1990
1990
1985
1988
1988
1990-96
1988
1988
1985
1990
4000-2001 BCE
1987
1986-1987
1987
1989
1989