Santos,
Serial number prefix 'Z' = 1963.
The H&R Model 733 is the Nickel plated version of the Model 732, 6 shot .32 S&W Long, swing-out cylinder, 2.5" barrel with small rounded butt or 4" barrel with windage adjustable rear sight and large square butt.
Made in two model series: 1st 1957 to 1972; 2nd (with transfer bare safety/ignition system) 1973 - 1986. The short barrel version seems to have been much more popular as many more of them are seen in the market today.
Either models have the following current RETAIL values:
100%/NIB - $180 - $195; 95% - $140 - $150; 80% - $110
Add $10 to $15 for 4" barrel.
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