I want to know the answer to the following question:
Which cameras were first of their type to adopt the ASA scale?
All the background I'm provided with is that "This conversion was not necessary on Weston meters manufactured and Weston film ratings published since 1956 due to their inherent use of the ASA system; however the changes of the ASA PH2.5-1960 revision may be taken into account when comparing with newer ASA or ISO values.". Is that enough to answer the question?
Answer: no