Petzl Am'D Ball Lock (plastic sleeve v2b gold)

Am'D Ball Lock (plastic sleeve v2b gold)

Name:Petzl Am'D (plastic sleeve v2b gold)
Sub Item:Ball Lock
Category:triple-action twist lock
Locking Type:full-auto
Unlock Style:press-and-twist
Sleeve Rotation:45° (unlocked) | 45° (maximum)
Shape:asymmetric D
Nose Guard:none
Gate Shield:relieved: blocked
Weight:74.2 g
Dimensions:Length: 110.80 mm
Width: 63.62 mm
Depth (basket end): 10.18 mm
Gate Opening: 23.84 mm
Strength Ratings:Major Axis: 28 kN | Minor Axis: 7 kN | Gate Open: 8 kN
Other Markings:Forged: PETZL Am'D Pat. | (ratings) (ce-logo) 0197
Injection Molded: (Petzl oval logo) (fingerprint texture) BALL LOCK PATENTED Ⓚ (fingerprint texture)
Stamped: 05321A
Hand Engraved (electropencil?): BK
Batch Marking Location:spine-exterior-left
Collection Criteria:★ Mechanically Interesting
Summary:plastic sleeve button-lock
Description & Commentary:

Introduced in 1997, the Ball lock was Petzl's first triple action auto locking mechanism (predating the Triact), which operates quickly with a button press and 45 degree twist. The plastic sleeve has finger grooves with a molded fingerprint texture. The button protrudes significantly more than the metal sleeved version and I find it more difficult to depress fully.

Petzl's similar manual locking Spinball was introduced later and uses a 120 deg twist.

Differences from : This version lacks the Ball Lock and UIAA k-circle #1939 has forged onto the spine. It has them on the plastic sleeve instead. Batch marking is on the spine-exterior (read correctly when the gate faces left) rather than spine-left. These differences suggest later production than 1940.

This is the gold version, which I believe was a color exclusive to Sherrill Tree

Relevant Patent:US5608953