This roaster, formally owned by H. Van Marselis Hartsinck Koffie Makklaars in Amsterdam; was bought by Liegh McDonald of 7grams Specialty Koffie in De Rijp, Nederland. Liegh commissioned us to restore this beauty hidden in a thick layer of dust into the showpiece that it is today.
The Probat BR5-M100 is a rare coffee roaster and we are honored to add our name to the story of this great machine and to breathe a new life into this piece of history.
If you have an antique roaster laying around and you want to bring it back to life, please contact us and we'll help you to not only restore the machine, but to also make the piece into something you will be proud to show off and your competitors will be jealous.
The transformation of a 1966 Probat sample roaster.
1966 Probat BR5-M100 Transformation // 7 grams Specialty Koffie, NL
Restorations and Modifications
Here at Dolce Alchemia, our passion for coffee extends to many different areas. Part of what makes our different brands unique is the machines that we use. Why buy a brand new, plug and play roaster when you can buy an old tired roaster for a fraction of the cost and have us build it for you, to your specifications? Nothing beats a photo op than a shiny; old, but newly restored machine in your factory or cafe.
Below your will find galleries about the transformation of some machine that we have worked on.
If you like our work and have a project in mind, why not send us an email and let's discuss the possibilities.

![]() State of the findThe roaster in its original state, in it's original location. Located on one of the famous Amsterdam ring canals. | ![]() Original StateThe roaster, like most other sample roasters; is hinged and the coffee discharges from the drum. | ![]() Original Sales BookOriginal sales book circa 1965 |
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![]() breakdownThe motor assembly. The fan is directly connected to the electrical motor and the grind operates by pulley. | ![]() breakdownThe entire mechanical box taken apart. Very dirty and is in need of some love. | ![]() breakdownThe housings removed, with the burner housing and drum motors still attached |
![]() breakdownThe back of the machine with the burner housings removed. By each stack the motor is placed, both topside and bottom side. From the access hatch you can see the gas lines and behind those are the cyclones for the exhaust system. | ![]() breakdownThe drum housing with all the drum mechanisms still attached | ![]() breakdownDrum broken down and exploded view. |
![]() breakdownThe fan, the lungs of the machine. For a sample roaster to have this level of build up, I would say it hasn't been cleaned in a long, long time. | ![]() breakdownFan housing with flaky coffee vapor crust. Yum! | ![]() breakdownThis is the bottom side of the exhaust stacks. This is the view of the cyclone ports. The dirt build up is at the point where it is organic and growing. The original paint color is white, everything else is dirt. |
![]() breakdownClose up view of the cyclone. The dirt growing like algae. | ![]() SandblastingLet the cleaning begin! With a sand blasting. We took all the old paint off as it was scratched, stained, and there were rusty parts of metal. The cooling tray on the bottom is before and above, after. They are sitting on a plate that is before blasting and the grey plate to the right is after. What a difference! | ![]() sandblastingAfter all the sand blasting was complete. Already looking amazing! |
![]() sandblastingWow! | ![]() sand blastingAnother view. The gas lines were painted yellow in accordance with machinery standards. | ![]() conceptA concept of how the paint could look. |
![]() conceptA concept of how the paint could look. | ![]() PaintingPrimer going on. Painting with compressed air is my next favorite thing next to sand blasting. Instant results | ![]() PaintingColored layer. Wow! |
![]() PaintingAll the bits hanging in the painting booth. It looks like an art installation. | ![]() PaintingAll the bits hanging in the painting booth. It looks like an art installation. | ![]() paintingLook at that gleam. Clear coat applied! |
![]() 30.jpgAfter painting line up. | ![]() paintingAfter painting line up. Why didn't we also paint the boxes? The temperature in the boxes can get up to 300C and normal paint will not hold up at those temperatures. The boxes are enameled to protect against the heat, we found some semi matte paint with a tolerance of 600C to paint them with. | ![]() PolishingEach of the cooling trays are hand polished to bring out the shine. |
![]() CleaningThis is part of the motor assembly. Which one is before and which is after? | ![]() cleaningRemember those clogged cyclone ports with organically growing dirt? Same ports, only cleaner (and painted of course) | ![]() CleaningThe motor with fan assembly all cleaned and painted. |
![]() cleaningAnother view of the motor assembly. The fan is directly connected to the motor. The roaster also has an integrated grinder, which is powered by a pulley also attached to the motor. | ![]() CleaningThe exhaust stacks, wrapped with graphite motorcycle exhaust wrap. Not only does this stuff look cool, but also insulates better and is far less toxic than what used to do this job. | ![]() Final assemblyThis is a photo from VenuezBE, where the roaster made it's public debut. The roaster was still in a million pieces 2 days before when I go the call that it was going to be showcased there. I felt like I was on one of those custom motorcycle shows, scrambling to finish in time. |
© 2014 by The Coffee Alchemist.
Dolce Alchemia is a subsidary of The Coffee Alchemist. Zamenhofstraat 150 unit 435, 1022AG Amsterdam
Rekening: NL60ABNA 0483173746 Kvk Nummer: 58466436 Btw Nummer NL252963027B02
email:RoasterJosh@brew-master.com || Tel: (+31)642716425