4570Tom: Welcome aboard from Wyoming.
I show a fair number of 1JX through 8JXXXX Model 36s that shipped in 1970, beginning in June, so I think it's reasonable to believe yours might have shipped in 1970, too.
The highest "floating J" serial on my list is 997J66. There were no Model 36s during this era with more than three digits ahead of the "J."
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Wrangler of stray Chiefs
Bob
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