I currently own a 1975 Pulsar (aka Hamilton) LED watch. I noticed in 2002, Hamilton created a commerative edition to signify 30 years since they released the LED watch to the public. It's look is straight Pulsar! Does anyone know the difference between the following two models in terms of appearance and features? Hamilton Men in Black II (H51413199) and Hamilton (H121138911). It seems the H121138911 is not a MIB II, but the price is slightly higher than the H51413199. Your help is much appreciated as I hope to purchase one of them once I get a clearer understanding of the differences.