Context: General Electric switched to use the ASA scale in 1946. Meters manufactured since February 1946 were equipped with the ASA scale (labeled "Exposure Index") already. For some of the older meters with scales in "Film Speed" or "Film Value" (e.g. models DW-48, DW-49 as well as early DW-58 and GW-68 variants), replaceable hoods with ASA scales were available from the manufacturer. The company continued to publish recommended film values after that date, however, they were now aligned to the ASA scale.

Question: Which company adopted the ASA scale in 1946?
Answer: General Electric

Question: Beginning what year were cameras built with the ASA meter?
Answer: 1946

Question: How did older models convert to ASA scale?
Answer: replaceable hoods with ASA scales

Question: How was the ASA scale shown on models built after 1946?
Answer: labeled "Exposure Index"

Question: What were recommended film values lined up with after 1946?
Answer: they were now aligned to the ASA scale

Question: What company stopped using ASA in 1946?
Answer: Unanswerable

Question: When were the DW-48 and DW-49 models made?
Answer: Unanswerable

Question: What were models pre-1946 labeled with?
Answer: Unanswerable

Question: Who refused to create replaceable hoods with ASA scales?
Answer: Unanswerable

Question: What did the recommended film values no longer follow after 1946?
Answer: Unanswerable