Colt SAA 45 stands for Colt Single Action Army .45cal., if that's what you mean.
M1911, M1911A1, Colt SAA
No, they won`t. A Scout is a 7/8ths (or so) scale of a full sized Colt SAA.
made about 1889
Your colt single action army was made in 1906.
1903
about 1895
1898 if SAA, 1917 if M1911
If it's chambered for 45 Colt,, yes.
What is the age of a Colt .45 Single Action Army with a serial number ofSA95946
made about 1877
100-1000 or more depending on specifics