1835 Isabel II coin

we have a 1835 coin with the front that looks like a 1835 8 maravedis, but the back clearly looks like a 1837 4 reales.    any ideas?

Please add pictures of both sides of the coin in addition to data on weight, diameter and metal

There is one Spanish 1835 coin it might be - though it is not on Numista yet
There is KM# 576 which is made from 1834 to 1836 and is face value 20 Reales
Metal is 0.903 Silver  0.7862 oz.  ASW
Obv: Head right   Rev: Crowned arms divides value in order chain

Also now found another - this is an 1835 4 Reales (with a picture, but no KM# number) ...

http://www.coindatabase.com/coin_detail_pesetas.php?cdb=R160004

The same coin is also on here ...
 
http://www.rhinocoins.com/spain/isa2d.html

those links look just like my coin, how do we get it added here, so I can add it to our collection?

https://en.numista.com/catalogue/contributions/nouveau.php

 Just fill out all the details of your coin on the page on the above link. If you can take good pictures of both sides of your coin then add them on there as well, like radrick007 mentioned; those pictures I showed cannot be used due to copyright. I do not know what the KM# number is, but one of the Admin. team will have a catalogue and could add that when verifying, I guess. Welcome to the site as well.  

Has your coin got the mint mark "CR" or "DR" at the bottom of the reverse?

If it has "CR" it's probably:

KM# 510.1 - 4 Reales - 1835 CR
VG: $20 F: $35 VF: $70 XF: $150

If it has "DR" it's probably:

KM#510.2 - 4 Reales - 1835 DR
VG: $20 F: $35 VF: $100 XF: $200

Either way, looks like you have a very nice coin!

I agree with charliebest, it looks like a lovely coin. Perhaps you can post the link here when you have added your coin to the catalog.

we're trying to get some good photos, we've found a few coins in our collection that aren't listed on this site.  I'll add them here as well.  thanks for all the help.