1700 Scottish Testament - strange symbols

[AnneD]

I am deciphering a 1702 testament - my first attempt - and these symbols appear frequently, usually associated with Names, dates, or sums of money.  Could anyone more experienced tell my what they are, and what they mean, or indicate ? 

[GR2]

If you showed a little more, it would help put them in context.

[AnneD]

Thanks for reply - 2 context examples below

[GR2]

The first seems to be a form of librae = Latin for pounds, usually written li or lib.

The second one is an abbreviation of centum = Latin for 100.

[AnneD]

many thanks - certainly makes complete sense for the second (money) example; not so much before and after the year.  I appreciate your help with this. 

[GR2]

It does not seem to serve much purpose around 1690:

moneth of [  ] 1690 [  ] zeirs faithfullie maid and gi[ven up]