Timeline for all types of items produced by
Olivetti Prodest [Milan, Italy]

Year	Items
1981	2
1982	2
1983	3
1985	3
1986	20
1987	64
1988	7
1989	5
1990	1

107 items with a valid date were considered for this timeline (82.95% of the total)
22 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 7 items.
199?: 1 item.
19??: 14 items.