Some models may have been produced into the early 1980s.
A model for the effective management of health and safety at work has been produced.
The model 1100 was produced through the entire production run of this series.
The first two models were produced in small numbers from 1939.
Several different models were produced over the years, but the B3 became standard.
This model was produced from 1978 to 1980 and is considered especially rare.
The first models were produced in 1940/41 and the body went through a number of design changes throughout the war.
The larger model 90 that appeared in the same year was produced until 1929.
There were two main models produced during the production run.
Scientists have produced models for us here, and I think we should put them to use.