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NUMISTR / RESEARCH REFERENCE

Key dates, semi-keys & varieties

Know the date, the variety and the reason it matters before paying a premium.

Sources checked: October 18, 2026

A key date is meaningful within a defined series. Below are documented dates and varieties worth recognizing; “semi-key candidate” is our collecting interpretation of relative mintage, not a universal market grade.

Lower-mintage date within type

1940 · 1 Lira · KM 869

253,000 vs 6,167,000 (1941)

Same .830 silver and 12 g as 1941. Check original surfaces and grade-matched sales.

Catalogue evidence ↗

Series semi-key candidate

1935 · 25 Kuruş · KM 864

888,000 vs 10,576,000 (1936)

Lower production than the other dates listed for this three-year silver type; verify surviving quality.

Catalogue evidence ↗

Series semi-key candidate

1935 · 50 Kuruş · KM 865

630,000 vs 5,082,000 (1936)

The 1937 figure is 4,270,000. Relative mintage is a reason to examine, not a guaranteed premium.

Catalogue evidence ↗

Major design variety

1934 · 100 Kuruş · KM 860.1 / 860.2

718,000 combined

High-star and low-star varieties. Do not count the combined mintage twice.

Catalogue evidence ↗

Ruler key / alteration risk

AH 1293/1 · Murad V · 20 Kuruş · KM 712

128,000

NGC warns that Abdülhamid II KM 722 coins can be altered to imitate Murad V; the tuğra differs.

Catalogue evidence ↗

Low-mintage regnal date

AH 1336/2 · Mehmed VI · 20 Kuruş · KM 818

1,530

Match ruler, year 2 and exact type. Do not transfer scarcity to every 20 kuruş.

Catalogue evidence ↗

Lower-mintage first regnal year

AH 1327/1 · Mehmed V · 50 Kuruş gold · KM 753

6,276 vs 89,712 (year 2)

Gold type with Reşat beside the tuğra. Confirm original issue and year; later products can resemble it.

Catalogue evidence ↗

Tuğra, inscription and date sizes

AH 1293 · 2 / 5 Kuruş · KM 736 / 737

Varies by regnal year

NGC notes size varieties. A different-looking numeral is a lead for plate comparison, not a new variety by itself.

Catalogue evidence ↗

Mintage, survival and condition rarity

Mintage counts production. Survival asks how many remain; condition rarity asks how many remain at a particular quality. None can be substituted for the others. A scarce date with heavy cleaning may be less desirable than a common date with exceptional original surfaces. Compare exact catalogue type, grade and problems before using a price.

Does low mintage mean a coin is rare?

Not by itself. Survival, condition, variety and demand must also be considered.