Dating back to 1790, the intricately designed Valentine filled with heartfelt messaging would fetch up to £4,000 if auctioned today, Royal Mail reported.

It is currently housed at the British Postal Museum and Archive. The card is a handmade puzzle which unfolds to reveal poetic messages - a far cry from the short notes written in today's Valentine's cards.

The inscription reads:

"My dear the Heart which you behold,

Will break when you the same unfold,

Even so my heart with lovesick pain,

Sure wounded is and breaks in twain."

"This year Royal Mail will be delivering over 12 million Valentine's cards but probably none as romantic as the verse written inside here. This card is a valuable piece- we would never sell it." commented Patrick O'Neill, from Royal Mail.

True. Can we really put a price on true love??..