Well it has been some time since I started the modification and had the problem. Well I thought I update the status of this watch and the modification. To update those not familiar with the background of this watch, I started this modification to replace the movement. During the modification process, I found the stem tube was cracked and the thread in the crown was damaged.
Since this watch is not the standard watch that we find sold everywhere, locating a replacement stem and crown is not easy and I am still searching. I did find a replacement stem tube but the crown that came with it is very very small. The search continues and I will bring updates as and when I do locate the replacement parts.