Platinum’s #3776 Century Black Diamond fountain pen contrasts a dark resin body with silver-toned trim, with Slip & Seal inside its screw-on cap.
Dark resin and silver-toned trim give Black Diamond its understated character. The nib is 14k gold. Inside the screw-on cap, Slip & Seal limits ink drying while the pen is closed.
The pen accepts ink cartridges or a converter for bottled ink. It measures 139.5 mm capped and 153 mm with the cap posted, with a barrel length of 119 mm and a barrel width of 16 mm. It weighs 20 g with the cap and 15 g without it.
It seals the nib inside the screw-on cap to limit ink drying between uses.
Yes. The pen accepts a converter for bottled ink as well as ink cartridges.
Yes, we are an Official Platinum Authorised Dealer, and an authorised dealer for every brand we carry.
With over 15 years in the luxury market, we guarantee the authenticity and quality of every piece we sell.
Your order arrives brand new in its original Platinum packaging, with all official documentation and the Platinum warranty card, stamped and dated by us.
The warranty covers manufacturing defects. It doesn't cover normal wear and tear or accidental damage — and on watches, it doesn't cover straps, bracelets, or batteries.
Questions about a specific piece? Our specialists are happy to help. [Contact our team →]
Questions about a specific piece? Our specialists are happy to help.
Yes — free DHL Express shipping on all UK orders of £400 or more.
Every order ships with a tracking number, so you can follow your package every step of the way. Shipments are fully insured and delivered by DHL Express with signature required.
Most in-stock orders arrive within 1-2 working days of dispatch.
No — the price you see at checkout is the price you pay.
Our prices include VAT, and nothing is added beyond the delivery charge shown.
DHL will never ask you for a payment on delivery, and no surprise invoice arrives afterward.
No handling charges, no processing fees, nothing added at the door.
We accept all major credit and debit cards, Apple Pay, Google Pay, PayPal, and bank transfer.
Every transaction is fully encrypted, and we never store your card details.
Paying in instalments. Choose PayPal at checkout and you may be offered the option to spread the cost, including interest-free plans on qualifying orders. Plans, terms and eligibility are set by PayPal and shown before you confirm, with no obligation.
Paying by wire, or buying more than one piece? [Contact our team →] and we'll take care of you personally.
You'll find availability on every product page, right above the Add to Cart button. Here's what each status means:
"Dispatched next working day" or "Only 1 left" — the piece is in our warehouse and leaves the working day after you order.
"Dispatched within X working days" — the piece is held at our secondary warehouse. We allow a few days to inspect and authenticate it before dispatch.
"Check delivery date" — the piece is available to order, but we confirm the exact date with the brand. As soon as you order, we contact the manufacturer and email you an estimated date.
Need something by a specific date? Tell us and we'll check before you buy. [Contact our team →]
You have 30 days from delivery to return your order.
How returns work. Just let us know and we'll email you a prepaid DHL Express return label — you never have to arrange a shipment or pay anything up front. The return cost is deducted from your refund. If the piece arrived damaged or wasn't what you ordered, the return is on us.
Your refund options.
To qualify for a full refund, the piece must:
Not sure whether something qualifies? Ask us before you ship it back — we'll tell you straight. Contact our team.
Our specialists are here before and after you buy — no pressure, no obligation. Authorised dealer, official warranty, and guaranteed authenticity on every piece.






