Screw Threads on Royal Worcester Coddlers

The screw threads on the lids of Royal Worcester (RW) coddlers varies by pitch (or number of lines in the thread). The screw threads at the top of the coddler itself also varies in pitch, and the material from which the top rim of the coddler is made. Most of the coddler top rims were made of metal (stainless steel), except the rims used in Type 10. The rims of Type 10 coddlers (and a possible sub-type of Type 9) have a rim made of white nylon.

The screw threads of RW coddler types Type 1 through Type 7 have the finger-pitched, or tighter screw threads. These are indicative of an older coddler. The screw threads of RW coddler types Type 8 through Type 12 have the coarser-pitched, sometimes referred to as having "fewer" threads.

You can count three or four threads on the lid of a coddler of Type 7 or earlier, Standard or King Size. You can count four or five threads on the top of a coddler of Type 7 or earlier.

You can count one or two threads on the lid of a coddler of Type 8 or later, Standard or King Size. You can count three or four threads on the top of a coddler of Type 8 or later.

Coddlers with a backstamp indicating Type 7 (or earlier) but with lids with fewer screw threads have, most likely, had their lid replaced. Conversely, the presence of a finer-pitched lid alone should not be used as compelling evidence that the coddler is of an older type.


Single Size King Size
Side-by-Side Comparison of Threads
Single Size King Size


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