These two classic telephones have different characteristics and histories.
The 1957 black 500 model has a original line cord, which was common for that era.
The 1974 White 500, on the other hand, has a modular cord, reflecting the changes in telephone technology over the years.
Both these telephones still work on an analog line, showcasing the durability of these vintage devices.
However, an adapter will be needed if you want to use them on a digital line.
This is because analog telephones are designed to work with traditional landline systems, and digital lines often require an adapter or converter to bridge the compatibility gap.

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