It's quite a subtle difference but Colclough made a variety of tea cup shapes over the years. The most common later 2 cup shapes are referred to as C shape and D shape.
The C shape is shown on the left. C is slightly shorter and smooth sided, flaring slightly towards the rim, like the old Countess shape (C)
D shape is slightly taller and with a flatter bottom rising to a waist with a notable bulge in the top half of the tea cup, again with a slight flair to the rim.
Both shapes normally have identical handles with an arched break and thumb support.
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