The Philips 19B1CB has a maximum contrast ratio of 25000:1. That's 100% less contrast ratio than a 20000000:1 PC display, which is the most frequently found contrast ratio. Across all small monitors that were released around the same time as the 19B1CB the contrast ratio ranges from Mega Contrast to 100000000:1.
Alternative flatpanel monitors that have a 25000:1 dynamic contrast ratio currently available which you might also want to consider include because of it's better review score, the Philips 17S1SB (£57.52).
If you are looking for a PC screen with a higher contrast ratio then you might want to consider the Viewsonic VA2046 (£93.35) (1000000:1) which also has a higher rating.