Timeline for all types of items produced by
Silverbird Soft. [012439]

Year	Items
1985	2
1986	7
1987	9
1988	64
1989	9

91 items with a valid date were considered for this timeline (89.22% of the total)
11 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 11 items.