/var/named/zone/local/ should contain two files:

$ pwd
/var/named/zone/local
$ ls -al
total 16
drwxr-xr-x    2 named    named        4096 Feb 22 20:15 .
drwxr-xr-x    5 named    named        4096 Feb 22 20:59 ..
-rw-r--r--    1 named    named         195 Jul  3  2001 localhost.zone
-rw-r--r--    1 named    named         433 Jul  3  2001 named.local
$ 

$ cat localhost.zone 
$TTL    86400
$ORIGIN localhost.
@                       1D IN SOA       @ root (
                                        42              ; serial (d. adams)
                                        3H              ; refresh
                                        15M             ; retry
                                        1W              ; expiry
                                        1D )            ; minimum

                        1D IN NS        @
                        1D IN A         127.0.0.1
$ cat named.local 
$TTL    86400
@       IN      SOA     localhost. root.localhost.  (
                                      1997022700 ; Serial
                                      28800      ; Refresh
                                      14400      ; Retry
                                      3600000    ; Expire
                                      86400 )    ; Minimum
              IN      NS      localhost.

1       IN      PTR     localhost.
$ 


$ pwd
/var/named/zone/master/forward
$ ls -al
total 28
drwxr-xr-x    2 named    named        4096 Mar 10 11:49 .
drwxr-xr-x    4 named    named        4096 Feb 22 20:17 ..
-rw-------    1 named    named        1045 Mar 10 11:49 intra.example.com.db
$ 

$ sudo cat intra.example.com.db
$ORIGIN .
$TTL 300        ; 5 minutes
intra.example.com          IN SOA  dns1.intra.example.com. team-unix.example.com. (
                                2002011958 ; serial
                                900        ; refresh (15 minutes)
                                300        ; retry (5 minutes)
                                2073600    ; expire (3 weeks 3 days)
                                300        ; minimum (5 minutes)
                                )
$TTL 86400      ; 1 day
                        NS      dns1.intra.example.com.
$ORIGIN intra.example.com.
$TTL 3600       ; 1 hour
bertha                  A       10.17.4.8
www                     CNAME   bertha.intra.example.com.
$ 

$ pwd
/var/named/zone/master/reverse
$ ls -al
total 48
drwxr-xr-x    2 named    named        4096 Mar 10 11:48 .
drwxr-xr-x    4 named    named        4096 Feb 22 20:17 ..
-rw-------    1 named    named         684 Mar  8 15:32 4.17.10.db
$ sudo cat 4.17.10.db
$ORIGIN .
$TTL 300        ; 5 minutes
4.17.10.in-addr.arpa    IN SOA  dns1.intra.example.com. team-unix.example.com. (
                                2002030428 ; serial
                                900        ; refresh (15 minutes)
                                300        ; retry (5 minutes)
                                2073600    ; expire (3 weeks 3 days)
                                300        ; minimum (5 minutes)
                                )
$TTL 86400      ; 1 day
                        NS      dns1.intra.example.com.
$ORIGIN 4.17.10.in-addr.arpa.
$TTL 3600       ; 1 hour
8                       PTR     bertha.intra.example.com.
$ 


The slave directories should be empty. They will automatically get their zonefiles from the
other master server.