HOPMI Tube chair by H. F. Mertens for Pastoe, 1930s


incl. VAT (if applicable) according to margin scheme

Rare tubular chair named Hopmi designed by Hermann Friedrich Mertens (1885-1960) for UMS Pastoe in collaboration with HOPMI in 1932. HOPMI stands for Hollandsche Patent Metaal Industrie. From 1932 to 1934, HOPMI worked with UMS Pastoe on the production of a series of tubular furniture, characterised by the special torpedo nuts. These nuts made the furniture easy to disassemble and ship. HOPMI had this combination patented. In 1934, Gerrit Rietveld also designed a chair for Hopmi. Besides furniture designer, Mertens was also an architect. Among other things, he designed the old Unilever headquarters building in Rotterdam, which now houses the Rotterdam University of Applied Sciences. The condition of this special chair is still very good (see photos). It is still very solid and the upholstery is still good, no cracks or holes. Material: chromed metal, wood and skai. Dimensions: h x w x d = 80.5 x 51 x 62.5 cm, seat height is 45 cm, armrest height 69.5 cm. Source: Pastoe 100 Years, page 203. This chair is also in the collection of Centraal Museum Utrecht. Collector’s item!

Availability: 1 in stock

SKU: Z05535 Categories: , , , , Tags: , , , , , , , ,
Shipping class: Courier | 1-person delivery
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  • Add to cart for free delivery within the Netherlands and to Antwerp, Brussels and Paris.
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OtherEtsy: Armchair, Tubular Chair
DesignModel: HOPMI
Vintage Style:
Design Period:
AuthenticityProduction Period: 1930s
Attribution: Documented in vintage catalogs or other literature sources
QualityCondition: Very Good
Wear Due: Patina consistent with age and use
AppearancePrimary color: ,
Secondary Color: Black
Material: , ,
SizesSeat Height: 45 cm
Dimensions: 51 × 62,5 × 80,5 cm


Safe delivery of your products starts with proper protective packaging. We use bubble wrap, cardboard, tape and packing polythene. Corners and fragile parts are protected with cardboard. T0 make sure the products are stable in the cardboard box, we use foam or air cushions. If we have to disassemble the products, we will provide a manual for easier assembling.

We only work with reliable shipping partners, fully equipped regarding the specific shipment task.  If something might go wrong during transport, we will take responsibility.


When you choose to collect your order, you get a 10% discount, because it saves us packing and shipping. Another advantage is that you can inspect your purchase in real life and take the item with you when you like it. Most of the time we are in the store. Please let us know in advance on the order form, email or telephone. On Friday and Saturday between 13:30 and 17:00 we are in the warehouse. Check our website for exceptions. Once we know that you will visit, we reserve your purchase, usually three days. Please let us know if you want us to keep the item for a longer period of time.


Shipment is for free within the Netherlands and to Antwerp, Brussels, Paris and Berlin. Postal packages within the EU are included in the webshop prices as well. If the items you choose are too big for a postal package, we can make you a custom quote. That is also the case for shipment outside the EU, we ship worldwide.

Shipping costs will be calculated during the ordering process in our webshop. If the shipping costs can't be calculated online (yet), you can choose to request a custom quote. We will let you know the shipping costs as soon as possible.

If you have specific wishes regarding the delivery of bigger items, like express delivery of the second floor, it is possible that we quote additional costs.

If you might not be satisfied with your purchase, you will receive a full refund, but the return costs are for your account. We state the transport costs on the quotation and / or invoice, so that you know exactly where you stand. Return within 14 days of receipt.


All prices in our webshop are in euro's and VAT included (if applicable). By default we use the margin scheme, a special tax regulation for used goods. All prices are vat included, but there is no vat amount mentioned on the invoice. Outside Europe we use the same prices. To compensate, we don't charge additional payment- and handling costs.

Do you have a company with the right to deduct VAT? We can also create normal VAT-quotes and/of invoices. For companies within the Netherlands against 21% vat and for EU companies against  0% btw (an intra-Community supply requires a valid EU VAT-number). The normal vat-quote can be requested via de webshop or the contacttab.

For Dutch companies the total amount including vat will be higher, because we will have to calculate and charge vat on the total amount. The vat excluded amount will be lower and makes this opportunity interesting.


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