One for fellow spoolers: WalkmanLand is a database of all 80s/90s portable cassette players (found via @simplebits' fine newsletter). My WM-22 still outperforms any modern alternatives and it's lovely to get this much detail. https://walkman.land/sony/wm-22
Sony WM-22 ▶ Walkman.land

The WM-22 was the first Walkman model that was sold in the UK for under £30.

Sony WM-DD22 ▶ Walkman.land

Last DD unit to be released, closing the cost-reduced DD1-DD10-DD11 line.

@matthiasott @colly @simplebits the last Walkman I had https://walkman.land/sony/wm-ex552 < it was nothing but a joy. #mixtapes
Sony WM-EX552 ▶ Walkman.land

A modern, thin, single AA powered model. It is the US version of the WM-EX550.