Identity boundary
Labels currently in scope
- 15-90
- 15-91
- 15K
Evidence note: Large installed base and useful OEM-number overlap; subclass, motor and factory differences require variant records.
AUDITED CANDIDATE · QUEUE #3
Singer Class 15
This dossier also has a public research-cluster page. Publication records the evidence boundary; it does not confirm a shared mechanical platform or part compatibility.
Source audit
1 model-level source lead
- specialistDIRECT DOCUMENT
Singer 15-91 parts list (1932)
Exact parts document already ingested; it cannot stand in for every Class 15 subclass.
parts list · Covers: 15-91 · Checked 2026-09-07 · Link only
Free demand evidence
16 unique autocomplete leads
US / English snapshot collected 2026-09-07. This measures suggestion breadth only—not monthly search volume.
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9 suggestions · ok
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9 suggestions · ok
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singer 15 parts diagram
9 suggestions · ok
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- singer 66 parts list