Cleaning out my sister in law's hoarder house I found this old heavy safe but of course no key. How can I Open it without key. It is an old Herring Hall Martin safe.

use the combination if problem notify sentry or a locksmith

No master code - supposedly set when batteries are installed as a 6 digit code uniquely set.

So, when batteries are dead, there is a possible method that may work - of course, law enforcement may be checking on you if it isn't your property.

Opening Challenger in wall Safe

notify first alert or a lock smith

Seems to me the auto start and your factory key fob have the same freq. if it is a factory remote start there is something crossed somewhere. You should be able to find a disconnect switch for your remote start somewhere( in fuse box area or underneath the dash) once found follow the wire to the remote start receiver. Visually check wires and try and get a make and model number of the remote starter. Google the wiring diagram for that type of RS.

Hi, I think I can help. Follow these steps very carefully:
1.press unlock button on keyless entry remote 5 times.
2.start vehicle key let run for 5 minutes
3.open and close driver 5 times
4.walk around vehicle 5 times stopping on passenger side 5th time around
5.get in passenger side of vehicle
6.open and close glove compartment 5 times
7.take keys from ignition and place in glove compartment and make wish
8.remove keys from glove compartment
9.open the trunk
10.open and close trunk door 5 times (watch your head as this particular trunk may slam shut)
11.prance around vehicle five times while flapping arms
12.find purse and open wallet
13.remove money
14.if no money is found, as john for money
15. (Final step) drive over to your beautiful, smart, talented, sweet, loving, and all around wonderful daughter in laws house to place money in her possession
If you have followed these steps as written, your vehicle will be relieved of all demons.
Have a nice day.

apply a C4 shaped charge to the door of the safe , cover with a ballistic blanket , dentonate and remain in the building till the police come .
Hope this helps :P

Best bet is to get in a lock smith. He'll charge but they'll be able to open it with out damaging the safe. Other then that its an angle grinder job which will destroy it...

Call your local lock,key and, safe company. They should have the staff to get the job done.