2xw said:Something like an Abus 83wp will see you right.
A lock which uses a simple and robust key, whilst possibly easier to pick for an expert, i would have thought is more likely to still open easily in 10 years time.
SamT said:I think I know where this is for, and the one we had most success with was actually a squire one but no brass though.
No reliance on springs to pop the shackle, only the lever springs and Nick mentions. Never thought about packing it with grease, but a done with a grease gun, to force it into the nooks and crannies of the lock is a great idea.