LEGO® Locomotive Gray Bricks

Description

Grey as the base tone

Dark grey and black define the picture and make the engine look sturdy and technical. Those colours suit the steam and industrial locomotives you would see at a big station. Trans-neon green and trans-red add touches that recall lamps and signals. The result feels serious without being dull, and the engine sits well beside more colourful wagons and buildings on a layout, neither dominating the scene nor disappearing into the background.

The numbers at a glance

The model consists of 106 pieces, including 30 different elements, and has no minifigures. That makes it a pure vehicle set for rail fans who want to add one more locomotive to their own layout. The parts list is short enough to read through calmly, yet long enough to contain a few interesting specialist parts that you can reuse in other builds around your collection whenever a project calls for them. Building it is pleasantly simple and does not take long.

The brown counterpart

One curiosity is the sister set in brown bricks, numbered 3746, which has the same piece count. You can display the two side by side and compare them. If you own both, you can swap parts and build your own colour variants, such as an engine with a grey boiler and a brown roof. It is an easy way of turning two small sets into a larger project that still stays tidy and takes up little space. Children can have a go at mixing the colours as well.

Checking parts and building on

If you are thinking of buying the set second-hand, the parts list on this page helps with the comparison, because it shows which elements appear and in what quantity. With “What can I build?” you can find out whether your own stock is enough for the engine or which pieces are still missing. That saves sorting time and avoids wrong purchases, especially with older sets whose parts are now rather hard to find.

FAQ

How does 3747 differ from 3746?

Both have 106 pieces, but 3747 is built mainly in dark grey while 3746 is brown. Both include trans-neon green parts.

Are any minifigures included?

No, it is a locomotive model only.

How many different parts are there?

30 different elements across the 106 pieces.