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John Sabato · 03-03-2008, 02:36 PM

According to the 1913 Luger blueprints, the checkering is 1.3mm apart and is accomplished at an angle of 19 degrees...

1.3 millimeters = 0.0511811024 inches

so ROUGHLY 19.538461524033136105329376414526 lines per inch.

You can answer so many of these types of questions if you have your own set of these blueprints... they are a fascinating study...

See my ad in the FOR SALE forum... (Yes, another shameless commercial!)

03-03-2008, 02:36 PM	#7
John Sabato Lifer Lifetime Forum Patron Join Date: Jun 2002 Location: The Capital of the Free World Posts: 10,155 Thanks: 3,003 Thanked 2,308 Times in 1,098 Posts	According to the 1913 Luger blueprints, the checkering is 1.3mm apart and is accomplished at an angle of 19 degrees... 1.3 millimeters = 0.0511811024 inches so ROUGHLY 19.538461524033136105329376414526 lines per inch. You can answer so many of these types of questions if you have your own set of these blueprints... they are a fascinating study... See my ad in the FOR SALE forum... (Yes, another shameless commercial!) __________________ regards, -John S "...We hold these truths to be self-evident that ALL men are created EQUAL *and are endowed by their Creator* with certain UNALIENABLE* rights, and among these are life, LIBERTY, and the pursuit of happiness..."*