BGS Subgrades Explained: Centering, Corners, Edges, and Surface

Beckett Grading Services uses four named condition subgrades—centering, corners, edges, and surface—alongside an overall BGS grade. The categories make a label more diagnostic than a single number, but they are still professional judgments. A home review can organise evidence in the same four buckets without claiming to reproduce Beckett’s process or final calculation.

Read each subgrade as a separate evidence question

Centering asks how the printed design is positioned relative to the card. Measure front and back independently, and record horizontal and vertical ratios. Perspective, asymmetric artwork, foil glare, and an incomplete crop can make a numerical result unsupported.

Corners cover more than visible whitening. Inspect original shape, sharpness, compression, fraying, layering, and colour loss. Rotate each corner under low light. A corner can look sharp face-on while a small crush appears as the reflection crosses it.

Edges include the cut and condition between corners. Trace all eight visible edge runs across both sides. Look for chipping, roughness, dents, foil lift, flaking, and colour loss. Separate an irregular factory cut from later wear in your description, but do not assume its origin removes its grading effect.

Surface covers a wide range of print and post-production evidence: scratches, scuffs, stains, indentations, print dots, lines, gloss changes, focus, and other visible characteristics. Use diffuse light for colour and raking light for texture. A single front image is rarely enough to clear this category.

Do not average the four numbers yourself

As checked on 13 July 2026, Beckett’s public grading pages describe a 1-to-10 scale with half-point increments and identify those four subgrades. The public scale also gives condition descriptions and centering examples by level. It does not justify taking four personal estimates, calculating a simple mean, and presenting that as the official overall result.

Instead, use a weakest-evidence review. Ask which category contains the clearest structural or presentation issue, whether that issue is reproducible, and whether another category remains unknown. An 9-like observation in three categories does not neutralise a serious surface indentation. Equally, one uncertain reflection should not be converted into a definite low subgrade.

Build a subgrade worksheet

Write location and side for every fact. Then assign confidence based on evidence quality, not how sure you feel about the eventual grade. This worksheet makes a follow-up photograph purposeful and exposes missing coverage.

Verify standards at decision time

Use the current Beckett grading page (opens in a new tab) and current Beckett scale (opens in a new tab) when preparing a real submission. Published criteria and service details can change after this guide’s review. Keep the access date with your notes.

The most valuable use of subgrades is diagnosis: they show why two cards with similar overall presentation may differ and which condition area deserves attention. Use that structure to inspect consistently, while leaving the official BGS label to Beckett’s in-hand assessment.