On 22 May, 13:07, sm_jamieson wrote:
I have a door with mortise lock and no key. Probably the original lock
from 1930s. Never needed to open that door before.

Saw through the bolt with a piece of hacksaw blade (Multimasters are
excellent at this). If it's an old lock, then the bolt will just be
soft solid brass.

If it's a rim lock rather than a mortice lock, destroy the case --
they're hardly rare. If you're already inside, you can usually
unfasten them from without damage.

Open the lock with a skeleton key. You'll probably find this easier
(even if you have to make your own skeletons) than trying to pick an
old, unused and probably stiff mortice lock with a pick. '30s domestic
locks rarely have sophisticated wards.

Phone around for locksmiths and get a price. It's just your basic
callout fee (and a couple of minutes), but that could be anything if
you live somewhere rural or the affluent SE. 45 quid locally.