Duograph

Family timeline

3 references in production order. Overlapping bars show overlapping recorded dates.

• B15508c. 1990–c. 1999
• B15507c. 1994–c. 2000
• B15047c. 1995–c. 1998

Dates are those recorded in the catalog. Faint bars mark approximate dates; a dashed point marks a single known endpoint. Undated references remain visible. Chronological order does not establish a predecessor or successor relationship.