You have the ID, it's a model 10-5 - it can be hard to sort that out with all the stampings. The D133000 serial number puts it as a 1969 or '70 ship date. The other marks are factory internal codes.
It is a K or medium frame gun and was the standard LE sidearm for many years; yours was one in the fourth million of this type of gun produced since 1899, and it is still being made. Enjoy!
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Alan
SWCA LM 2023, SWHF 220
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