Front
Method
Border
Left / Right
52.0 / 48.0
Top / Bottom
53.2 / 46.8
Yaw
−0.05° CCW
Corner Readings · Millimeters
Top Left
X 2.60 · Y 3.30
Top Right
X 2.40 · Y 3.30
Bottom Left
X 2.60 · Y 2.80
Bottom Right
X 2.40 · Y 3.00
Official Grading Record
2022 · Lost Origin
Condition Profile
RBH Grading Standard
Centering
9.5
Corners
10.0
Edges
10.0
Surface
9.5
Supporting Documentation
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Released Grading Record
Border mode calculates centering and yaw from the recorded corner-border measurements. Landmark mode calculates LR/TB from direct design-landmark distances and records yaw independently when a reliable horizontal or vertical reference is available.
Dimensional measurements are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty. Clockwise yaw is positive (+); counterclockwise yaw is negative (−). “Not measured” means no reliable yaw reference was available.
Method
Border
Left / Right
52.0 / 48.0
Top / Bottom
53.2 / 46.8
Yaw
−0.05° CCW
Corner Readings · Millimeters
Top Left
X 2.60 · Y 3.30
Top Right
X 2.40 · Y 3.30
Bottom Left
X 2.60 · Y 2.80
Bottom Right
X 2.40 · Y 3.00
Method
Border
Left / Right
53.5 / 46.5
Top / Bottom
49.3 / 50.7
Yaw
+0.08° CW
Corner Readings · Millimeters
Top Left
X 3.40 · Y 3.40
Top Right
X 3.00 · Y 3.60
Bottom Left
X 3.40 · Y 3.70
Bottom Right
X 2.90 · Y 3.50
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
Documented corner, edge, and surface conditions associated with this grade.
Where dimensional measurements are shown, values are recorded manually in millimeters and are subject to an approximate ±0.1 mm measurement uncertainty.
2 Blemishes
Blemish 01 · Surface
Front · C1
Very Small PitBlemish 02 · Surface
Front · D2
Trace Imaging PitCertified
September 22, 2026
Record Revision
1
This digital record is tied to the exact eight-digit certification number printed on the RBH label. RBH does not expose customer information, grader notes, or private scoring weights in the public registry.