Is MNH the same as unmounted mint?

Yes. Unmounted mint (UM) and mint never hinged (MNH) describe the same condition.

Is MNH worth more than hinged?

Often, yes, especially for twentieth-century and modern stamps. For classic issues the premium can be large, though good hinged examples remain desirable. It varies by stamp.

How can I tell if a stamp is never hinged?

Examine the gum on the back under good light for any hinge mark, thinning or remnant. Complete, undisturbed gum with no mark indicates never hinged.

What is the difference between MNH and MVLH?

MNH has never been hinged at all. MVLH (mint very lightly hinged) shows only the faintest trace of a hinge. See our MVLH guide.

Yes, by regumming. A regummed stamp is not MNH and must be disclosed; an expert can usually detect it.

Glossary

What Is MNH (Mint Never Hinged)?

Mint never hinged (MNH), also called unmounted mint (UM), describes a mint stamp that still has its full original gum and has never been mounted with a stamp hinge, so the gum on the back is exactly as issued. It is the top mint grade, and for many stamps it sells for more than a hinged example. You can recognise it by gum that is complete and undisturbed, with no hinge mark or thinning on the back.

Full original gum

Never hinged

The top mint grade

MNH / UM

The top mint grade

At a glance

MeansFull original gum, never hinged

Also calledUnmounted mint (UM)

Catalogue codeMNH or UM

GradeThe highest mint condition

How to tellNo hinge mark, complete undisturbed gum

Watch forRegumming passed off as MNH

What MNH means

A mint stamp is an unused one, never sent through the post. "Never hinged" describes the gum on its back. For generations, collectors mounted stamps in albums using hinges, small folded pieces of lightly gummed paper, and a hinge leaves a mark or a disturbed patch where it was attached. A never-hinged stamp has never had one, so its gum is pristine and complete, just as it was when the stamp was printed.

You will see the same condition described two ways. Unmounted mint (UM) is the term used by Stanley Gibbons and common in Britain. Mint never hinged (MNH) is the more international term. They mean exactly the same thing.

Why MNH matters to value

For many stamps, never-hinged condition carries a premium, and an MNH example can be worth noticeably more than the same stamp hinged. How much more depends on the issue.

For twentieth-century and modern stamps, MNH is the expected standard, and most collectors look for it. For older, classic stamps, genuinely never-hinged examples are far scarcer, because almost everything was hinged in the past, so the premium can be large, but a well-centred hinged example is still perfectly collectable and desirable. Catalogues often quote separate prices for mounted and unmounted mint on older issues precisely to reflect this difference.

In short, MNH is a genuine plus, but it matters more for some stamps than others, and condition, centring and rarity all count alongside it.

How to tell if a stamp is never hinged

Checking the gum

Turn the stamp over.
Look at the gum under good, raking light.
Look for a hinge mark.
A dull or disturbed patch, a small thinned area, or a piece of hinge paper still stuck on (a hinge remnant).
Check the gum is complete and even.
Not partly skipped, cracked or missing.
Tilt it under the light.
Hinging usually shows as a duller patch against otherwise even, shiny gum.
Decide.
If there is any mark, thinning or remnant, the stamp has been hinged and is not MNH.

The back of a never-hinged stamp shows full, even gum; a hinged stamp shows a disturbed patch where the hinge once sat.

MNH, MVLH, MH and unused, compared

The mint grades all describe the state of the gum. From best to least, in gum terms:

The mint grades
Grade	Gum state
MNH / UM (mint never hinged)	Full original gum, never hinged
MVLH (mint very lightly hinged)	Original gum, only the faintest trace of a hinge
MLH (mint lightly hinged)	Original gum, a light but visible hinge mark
MH (mint hinged)	Original gum, a more pronounced hinge mark
Unused / no gum (MNG)	No gum at all

For the grade just below never-hinged, see our guide to MVLH.

A word on regumming

Watch for regumming

Because never-hinged stamps can be worth more, some are regummed: fresh gum is applied to a stamp that had lost its original gum, or to hide a hinge mark, so it can be passed off as MNH. Regumming is a fault, and a regummed stamp is not mint never hinged.

A regummed stamp must always be disclosed. An experienced eye can usually detect regumming, and for a valuable stamp an expert certificate puts the question beyond doubt. It is one of the clearest reasons to buy from a dealer who describes condition honestly and shows you the back of every stamp.

How we describe MNH

We grade to Stanley Gibbons' terms, and we photograph every stamp front and back in high resolution, so you can see the gum for yourself rather than take our word for it. Any regumming, hinging or disturbance is always disclosed. You can read more on our quality and grading standards page.