restoration of a old rusty clybrun spanner (all feedback welcome)

the original condition. it was pretty rusty nothing moved

I tried to take the rust by electrolysis so i had to change a battery charger

the connected charger

the spanner and some sacrificial metal. I only used water and regular kitchen salt. don't know how much, i just put it in and prayed to don't turn my charger to a smoke machine

after a minute or so there was already a lot of bubbles

after 10 hours in solution

the result after. a lot of the rust came out and it was a lot easier to remove

it pieces became lose enough to dismount the hole thing

the detail of the D in the jaw. if somebody knows what this is please tell me

the worm screw

the bolt the keeps it all together

the spanner it self

next bath

23 hours later. it's all clean the rust came off extremely easy with only a handheld wire brush

the D detail

those marks are to put it in a metal lathe so the thread can be machined in

it's bent. i tried to fix it but the handle is to thick

this is 3 that's on the middle of the handle. again if someone knows what this means please tell me in the comments

everything mounted and working

and now after a generous layer of boiled linseed oil

final notes, the electrolysis doesn't take the rust only makes it a *lot* looser. this old pieces need a lot of filing to take the beaten up spots. boiled linseed oil is a good lubricant. and as @MrNohbdy said always do the electrolysis part in a well ventilated area, doing it with salt produces hydrogen gas (flammable) and chlorine gas (toxic)