Your gun is a "Pre-Model" 28 and may have just come with a Helpful Hints Brochure.
The instruction manuals were introduced in 1957 to coincide with the Model numbering identification.
The Model 28 No Dash paperwork shown below (Dated 1-60) displays the gun wearing "Diamond Magnas" and a 4 screw gun parts breakdown.
The later Model 28 paperwork suggested above is very easy to find and purchase but will not be perfectly accurate to your 1950s Highway Patrolman.
Good hunting and best wishes
Last edited by rgm36; 03-18-2017 at 08:32 PM.
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