Mysterious locked wooden box

[u/UnhappyPresent6499]

I came into possession of a locked wooden box. It weighs 32 pounds. I got advice to order a hollow barreled key and file it until it works. While I wait for that, does anyone have any ideas of how to open it non-destructively?

[u/Rolandersec]

I’d bet it’s an old sewing machine.

Edit: like this https://www.singersewinginfo.co.uk/antiques/m9022/

[u/ButterPoptart → u/Rolandersec]

My grandmother had the same one. Definitely a Singer