The Thompson matrices can be used on the Monotype caster with a special adapter. It seems that quite a lot of these American mats came to Australia with the US Forces who were stationed here during the Pacific War. There were very few Thompson Typecasters in Australia, as far as known now. The Museum would like to receive further details about this. Our collection is about 70 sets.
Many sets seem to contain occasional replacement mats of more recent construction.
These seem to be nickel plated, and the series details are not stamped on but roughly engraved. You may wish to consult our List of Thompson mats, but at the time of writing it is only an outline. In particular, we have no information on the specific processes used in the manufacture of mats.