Hey fellas, I have gathered a new experience of DIY drilling concrete wall and successfull in putting a clock and a showpiece. The task is an easy one and since it was my first time I took a slow and steady effort. Got a Bosch 600watt home drill with Masonry bits. Here is the end result.
One more clock in the other room.
I don't think it is a very special post but wanted to share my new experience with the community.