The last # of the Remington model # usually indicates the handle material. From a guide book.
#1 Rosewood #2 Black #3 Jigged Bone #4 Pearl #5 Pyremite
#6 Stag #7 Ivory or White #8 Cocobolo #9 Metal #0 or #10 Buffalo Horn
Here is a #1 with Rosewood handle. R31 Jack that is lightly used and appears to have original edge.
#1 Rosewood #2 Black #3 Jigged Bone #4 Pearl #5 Pyremite
#6 Stag #7 Ivory or White #8 Cocobolo #9 Metal #0 or #10 Buffalo Horn
Here is a #1 with Rosewood handle. R31 Jack that is lightly used and appears to have original edge.

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