Matrix Tool
The matrix tool presents the same archive catalogue, but seen the other way round: every documented variation of every title, per variation type. You will find every title down the left, every label, shell or pressing type across the top, and a matrix of coloured squares that identify documented variations in the Canadian catalogue.
Click any coloured square from the matrix to reveal contextual details in the right panel.
Follow the link for a direct dive into the related archive pages. The number inside a square is how many variations fall under that type; click a column heading to highlight it, and use the search box to narrow the grid.
