Omega Speedmaster is an iconic watch. There are two variants on sale – haselite and sapphire crystal. Both have their advantages with haselite being more prone to scratches.
However, Haselite is more closer to the original watch that went into space. It is also iNR 80000 (almost $1000) cheaper.
You can buy Polywatch from the eBay or Amazon for less than $20 and it would allow you to remove scratches easily. Apply few lines of Polywatch paste onto the glass. Then, use a microfiber cloth and start moving your hands in circles while maintaining some pressure.
Keep moving your hand in circles for about 2 minutes and you will see most of the finger scratches gone. Apply more paste and repeat the process until you get rid of all the scratches.