White clay was almost always used (some rare examples of red/brown clay exist and are likely to be from periods when the normal source of clay ran out). Embossed and incised base numbering is used. Items are never moulded with Germany or West Germany.
If a form was made in more than one size the form number was followed by a number (1,2,3 etc). The higher the number in the sequence the larger the vase. The photo of vases shows form 321 in sizes 4, 3, 2 and 1 (from left to right).
If a form was made in only one size the items are marked with the form number only.
Some form numbers (below 100) were preceded by a letter (e.g. B, G, R etc).
In some rare cases the bases were hand inscribed with the name Ruscha and the decor name.