According to my 75 parts list, 160337 is for RHD cars and 160338 for LHD. Later issue locks are made with enough holes that they are reversible to suit either drive side, which is why the number has reverted to just 160337.
I'll check my stocks, think I have one left!
PS not having ANY keys, you will need door locks too, since those are (should be) the same key as the ignition. The key number for the boot and glovebox (SHOULD be the same key) is on the glovebox lock barrel. I have a matching pair of NEW front door locks with 2 keys or probably, for a tad less, a matching pair of used with one key.
Thanks Steve - I've just been offered a steering lock and a matching pair of door locks by another forum member.
Now need to see if the glovebox is open...
After 37 years I've finally got my hands on a Mimosa Sprint