What is different about this bolt

[RCS]

What is different about this revision 1 bolt ?

Information

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[browningautorifle]

Bolt has no SA after the drawing number. It has the space between the D and the number and this one is extremely rare, having a short time before the revision 2 bolts came out. The space between the D and the number was deleted when the SA was added to the sequence. That makes this one another of your trove of gas trap parts?

[RCS]

From Billy Pyle's book "The Gas Trap Garand" page 121 "Revision one bolts with the legend D28287-1 and D28287-1SA on the same line are extremely rare and seldom encountered, as they had a very short life span in the M1 production sequence before being superseded by the revision 2 (-2). "

Most or almost all of the revision 1 bolts that the collector will find will have the -1 stamped below the drawing number as shown in the photo.