No charge from the old MagSafe charger into USB C. Very disappointing and expensive mistake.
With both my MagSafe 1 power adapters :(
Normally I use to adapter for the power outlet of an old Apple Cinema Display to charge a 2019 MBP 15in, but sometimes also with Magsafe 2 charger and both work well.
Note: the adapter is Magsafe 2 to USB-C, to use it with a Magsafe 1 connector, you need the small adapter from Magsafe 1 to Magsafe 2.
Note: the webshop doesn't allow you to download an invoice, but at simple request to support@ it is was sent to me promptly.
45w magsafe for Air charge a little MB Pro 13inch 2018
Thunderbolt Display also can charge MB Pro 2018.
I'm using this adapter for a few weeks with my new MacBook pro and various magsafe 2 chargers scattered in different places I work. This adapter works with all of them. Seems to get warm but hasn't been a major issue. Saves me from carrying the charger everywhere.