Timeline for all types of items produced by
Siemens

Year	Items
1980	1
1984	2
1985	5
1986	5
1987	3
1989	1

17 items with a valid date were considered for this timeline (70.83% of the total)
7 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 5 items.
199?: 2 items.