MaK G 1204 BB

Updated: August 2026 – These vehicles rarely stand where spotters already are. The MaK G 1204 BB works in a world with its own rules: siding tracks, works stations, port areas – places that operationally belong to the railway but legally are private property. This page explains the type designation, the everyday operation behind it, and what that means for observation and photography.

What is the MaK G 1204 BB?

The MaK G 1204 BB is a four-axle diesel-hydraulic locomotive from the type programme of Maschinenbau Kiel, designed for shunting and transfer duties. The designation follows the Kiel system: “G” for the design with hydraulic power transmission, the number for the 1200-series power class with the design stage in the final digit, “BB” for two two-axle bogies.

Like all types in this series, it carries a manufacturer’s type designation rather than a class number. Direct neighbours in the family are the MaK G 1203 BB and the MaK G 1205 BB; the modern continuation of the same job is found in types such as the Vossloh G 6.

Siding traffic: where these locomotives actually work

A goods wagon’s journey doesn’t end at the freight yard. Almost always, the final kilometres to the loading point are covered by a shunting locomotive on a non-public facility – the siding. Regional railways such as Osthannoversche Eisenbahnen have built their business around exactly this last mile over decades.

That’s exactly what shapes the spotting strategy: it’s not the timetable that counts, but the pattern. Anyone who visits a siding several times at different hours quickly learns whether work happens there in the morning, in the afternoon, or not at all. How to record such observations properly so they stay useful over months is described in the guide to a sighting logbook.

Placing it in railway operations

The type code at the start of the twelve-digit vehicle number says what a vehicle is designed for. 98 stands for diesel shunting and light locomotives, 92 for diesel main-line locomotives. That also explains why these two groups are found in such different places.

Facility type	Accessibility	Realistic viewing chance
Public station with a siding	publicly accessible platforms	good, from a safe distance
Road bridge over a siding	public road space	often very good, clear view
Works site with its own railway	private property	only with the operator’s permission
Port area	partly public, partly closed off	depends on the specific area
Track areas and stabling sidings	off limits in principle	none – no entry

Spotting and photography at the edge of a facility

Sidings are photographically awkward: tight curves, fences, vegetation, often unfavourable light. On the plus side, the vehicles move slowly, which makes short shutter speeds unnecessary.

• Location before subject. First check whether a spot is publicly accessible. Only then is it worth thinking about the framing.
• Use fences deliberately. A fence in the foreground is more honest than a shot that looks as if you were standing in the track area.
• Details over the whole picture. The data panel, builder’s plate and keeper marking carry the identification – the full view is just trimming.
• Come back more than once. On your first visit you learn the site, on your second you photograph it.

The distances that apply here are covered in the article on safe distances at the track. Systematic location criteria for facilities with shunting operation are covered in the guide to spotting at marshalling yards.

Keeper, colour and location: all just a snapshot

Anyone who studies state railway classes is used to vehicles belonging to the same company for years and running in the same colour. That’s not true of shunting locomotives owned by private keepers. Machines are sold, leased, moved between sites and repainted with every major overhaul.

For you, that means three things. First: any information on keeper, livery and place of work on this page should be explicitly understood as subject to change – check the current state before relying on anything. Second: the keeper marking at the end of the twelve-digit vehicle number is a snapshot, not a permanent feature. Third: that’s exactly where the value of your own documentation comes from. Two sightings of the same machine with a different marking prove a change of keeper to the day – information that no general overview delivers so precisely.

Only two things stay constant: the works number on the builder’s plate and the structural features you can count and measure on the vehicle. Number of axles, arrangement in bogies or a rigid frame, bonnet shape – all of that outlasts changes of keeper and repaints.

That’s why it’s worth recording both at every encounter: the stable identity via works number and vehicle number, and the changeable state via date, place, colour and markings. Only the combination produces an entry that still says something in five years’ time.

Common mix-ups

Conclusion

One more word on expectations: siding traffic isn’t operation you understand in an afternoon. It can take weeks for a pattern to emerge, and some sidings are only served on a few days a month. Anyone who factors that in is less disappointed – and ends up documenting vehicles that barely appear in any collection.

The MaK G 1204 BB is a working vehicle in an environment that’s hard for outsiders to access. That’s exactly what makes documenting it valuable – and exactly what demands restraint. The type designation gives the structure, the builder’s plate gives the identity, the vehicle number gives confirmation. The rest is patience at the fence.