More recent Singapore Postmarks

Singapore postmarks have changed quite significantly since the 1970s and here's some of the more recent updates. We still have the traditional round postmarks:

Here's a round postmark, with different designs from those 'C' series:

Other than round types, we have the octagonal types as well:

There are also postmarks on 'strips' for bigger mail items:

Postmarks also contain more messages, sometimes for nation building purposes:

One of the latest innovation is the use of 2D barcodes as postmarks! Not sure why is there a need for such complex postmarks, and what data is captured inside the barcode. Hmm.