There were seven Z-ton sizes made in three series. The first series from 1962 had a different shape eye than the later two. The third series changed the alloy to S.A.E. 4130.

↑ Set 302, 018, 303, 019, 304, 016, 017: Leeper Z–tons

• Made in Colorado, USA .

↑ 302: Leeper Z–ton

• Made in Colorado, USA [1970s].
• AS, 35x8 mm.

↑ 018: Leeper Z–ton

• Made in Colorado, USA [1970s].
• BS, 40x10 mm.
• From Michael Oatney, 2023.

↑ 303: Leeper Z–ton

• Made in Colorado, USA [1970s].
• CS, 45x13 mm.

↑ 019: Leeper Z–ton

• Made in Colorado, USA [1960s].
• AA, 50x6 mm.
• From Michael Oatney, 2023.

↑ 304: Leeper Z–ton

• Made in Colorado, USA [1970s].
• A, 60x8.5 mm.

↑ 016: Leeper Z–ton

• Made in Colorado, USA [1970s].
• B, 70x12 m. mm.
• From Michael Oatney, 2023.

↑ 017: Leeper Z–ton

• Made in Colorado, USA [1970s].
• C, 80x14 mm.