After reaching the age of 60. And with no social security credits of her own.A widow would receive:
If her husband did die at 75 years old. How much of his monthly
Pension would she receive. I did obtain this passage from social security
"A widow or widower, age 60 or older, but under full retirement age, receives about 71-99 percent of the worker’s basic benefit amount"

It seems to me the lowest percent would be 71% does that seem correct?

I had my own credits and I got 100% of my late husband's benefit.

The only way to know is to contact SS with the specifics of your situation.