It is a die clash, not a crack. Scroll down to the full coin image and you will see an example of the clash. Yours is not this coin but you can look through all of the listed VAMs and try to match other markers that may be on your example. http://vamworld.com/wiki/1884-O_VAM-5A
Definitely need better photos. It looks to be a far date, MM centred, upright and oval. Clash under chin and possibly bottom serif of N clashed at neck. Cant see clashed S at hair vee, tripled 1 or doubling inside left of MM, but images are not the best. Could possibly be Vam-30A
I would also look at Vam 23B which also has the doubled tops of 1-4 and the die crack above the cap in addition to the other pick up points
I don't think it's 23 the placement on the 1 in the date on 23 is farther to the right according to the arrows marked on vanworld site .