1934 Norton 'How to Sharpen' booklet;

https://ia801009.us.archive.org/34/it...

US Forest Service Ax manual;

https://www.fs.usda.gov › deliver
One moving part: The Forest Service Ax Manual

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TSS' reference shaper for making convex razor hones;
thesuperiorshave.com/product/toolsforhoning/

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Japanese bladesmith using hand shaped convex hones;

   • How Japanese Knives Are Made With Jap...  

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convex wood block (for applying pastes/sprays directly or using as a backer for strops or lapping films);

thesuperiorshave.com/product/tssbalsawoodconvexdoublesided/