I've finally gone ahead and delved into learning safe manipulation in order to eventually be able to open a large safe left in our garage by a deceased family member. It's been here for a few years, and I think was owned by their father beforehand.
It's a large safe with a Yale combination lock.


I have two questions I'd like to ask this crowd.
1) What type of yale lock is it? Model number?
2) I've previously bought 'The Challenge Vault' from Sparrows and I've been able to open it successfully several times on the hardest (realistic) setting. I believe it's basically a Sargent & Greenleaf model 2 combination lock. My question is, are the skills for opening this transferrable to the Yale safe I have, and how does that older Yale lock differ from this one?
Thank you much, I'm loving looking around this forum so far.