The 14mm ones are most likely 1/4 rupees, then, with the smaller one 1/8 rupees.
Unfortunately, none of the coins are dated; coins with clearly legible dates are generally more desrable (and higher value) than coins where the date is off the flan. The small coin (top pic, bottom centre) has the partial date 129x; unfortunate that the last digit is off-flan but these coins were only struck up until AH1295 (= 1878 AD), giving you an approximate date for that coin.
Some of the coins also seem to have test cuts and/or chop marks on them. I'm not sure how that affects the value.
1/8 rupees generally catalogue at around $7 in VF condition in my old 2004 edition 1800s Krause, while 1/8 rupees go for around $6. With the rise in silver price sine 2004, you can probably double that at least.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis