Source: ATF P 5300.11 · Curios or Relics List · Jan 1972 – Apr 20253,573 entries · 4 sections
The C&R RegisterA finding aid to the ATF Curios or Relics List, for Type 03 collectors
C&R · III · 061

High Standard Sentinel R-100 smoothbore, Diamond Ted edition

Section III: removed from the NFA, curio or relic under the GCA

Official wording

ATF P 5300.11 · APRIL 2025 EDITION · SECTION III · VERBATIM · PDF P. 25 ↗

High Standard, Model Sentinel (R-100), cal. .22, revolver having a smooth bore with integral choke, S/Ns 948, 995, documented as being owned by Diamond Ted Lewis.

What this entry requires

  • ATF REQUIRESConfigured as the ATF wording states: “having a smooth bore with integral choke”
  • ATF REQUIRESYour serial number is one ATF listsATF: “S/Ns 948, 995, documented as being owned by Diamond Ted Lewis”
  • INFOATF states no date; production was about 1955.

Editorial facts · Our research

Country
United States
Manufacturer
High Standard Mfg. Co., Hamden, CT¹
Type
Pistol
Action
Other
Caliber
.22
Made
Listed serials only · c. 1955production; ATF states no date²
Service
Commercial
Search listings ↗Check a specific gunReport an error ↗

Source

Official wording
ATF P 5300.11, April 2025 edition · Section III · PDF p. 25 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: Medium · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. Wikipedia, “High Standard Manufacturing Company” ↗, maker: High Standard in Hamden, CT 1946–1977
  2. leeroysramblings.com ↗, years: "R-100 was introduced in 1955"; "the Sentinel shown here is the R-100, (1st and only year of production)"; R-101 followed in 1956
Fact tags
  • ATF the ATF wording states it.
  • REF ¹ an outside reference supports it; the number points to the list of references.
  • ESTIMATE an approximate or indirect reading, for example the production range of the base model.
  • NO CITATION we haven’t attached a reference for this fact; it’s our editorial reading, not ATF’s.
Source checked
20 October 2026: ATF’s page still lists the April 2025 edition
Corrections
2 changes · see below

Correction history

  1. Evidence passYears: 1955–1974 → 1955. ATF names the R-100 design series; a collector history dates the R-100 to 1955 only (R-101 from 1956); 1974 was the end of the Sentinel line, not of the R-100
  2. Data-trust reviewEditorial confidence: Low → Medium. Re-rated after supporting references were added or re-checked.

All corrections · How corrections work

Historical context

NO VERIFIED IMAGE AVAILABLEWe show only freely licensed images verified to depict this model. None has been found yet.