diff --git a/addons/l10n_ch/models/__init__.py b/addons/l10n_ch/models/__init__.py
index cf7550fd368..cabbe1ea2b8 100644
--- a/addons/l10n_ch/models/__init__.py
+++ b/addons/l10n_ch/models/__init__.py
@@ -3,6 +3,7 @@
 
 from . import res_config_settings
 from . import account_invoice
+from . import account_journal
 from . import mail_template
 from . import res_bank
 from . import res_company
diff --git a/addons/l10n_ch/models/account_journal.py b/addons/l10n_ch/models/account_journal.py
new file mode 100644
index 00000000000..4ad11b5d84c
--- /dev/null
+++ b/addons/l10n_ch/models/account_journal.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import models, fields, api
+
+from odoo.exceptions import ValidationError
+
+from odoo.addons.base_iban.models.res_partner_bank import validate_iban
+from odoo.addons.base.models.res_bank import sanitize_account_number
+
+
+class AccountJournal(models.Model):
+    _inherit = 'account.journal'
+
+    # creation of bank journals by giving the account number, allow craetion of the
+    l10n_ch_postal = fields.Char(related='bank_account_id.l10n_ch_postal')
+
+    @api.model
+    def create(self, vals):
+        rslt = super(AccountJournal, self).create(vals)
+
+        # The call to super() creates the related bank_account_id field
+        if 'l10n_ch_postal' in vals:
+            rslt.l10n_ch_postal = vals['l10n_ch_postal']
+        return rslt
+
+    def write(self, vals):
+        rslt = super(AccountJournal, self).write(vals)
+
+        # The call to super() creates the related bank_account_id field if necessary
+        if 'l10n_ch_postal' in vals:
+            for record in self:
+                record.bank_account_id.l10n_ch_postal = vals['l10n_ch_postal']
+        return rslt
+
+    @api.onchange('bank_acc_number')
+    def _onchange_set_l10n_ch_postal(self):
+        try:
+            validate_iban(self.bank_acc_number)
+            is_iban = True
+        except ValidationError:
+            is_iban = False
+
+        if is_iban:
+            self.l10n_ch_postal = self.env['res.partner.bank']._retrieve_l10n_ch_postal(sanitize_account_number(self.bank_acc_number))
+        else:
+            self.l10n_ch_postal = self.bank_acc_number
diff --git a/addons/l10n_ch/models/res_bank.py b/addons/l10n_ch/models/res_bank.py
index 52c24f79d81..c54ba162bf3 100644
--- a/addons/l10n_ch/models/res_bank.py
+++ b/addons/l10n_ch/models/res_bank.py
@@ -29,7 +29,7 @@ class ResPartnerBank(models.Model):
     _inherit = 'res.partner.bank'
 
     acc_type = fields.Selection(selection_add=[("postal", "Postal")])
-    l10n_ch_postal = fields.Char(help='The ISR number of the company within the bank', compute='_compute_l10n_ch_postal')
+    l10n_ch_postal = fields.Char(string='ISR reference', help='The ISR number of the company within the bank')
 
     @api.depends('acc_number')
     def _compute_acc_type(self):
@@ -42,14 +42,14 @@ class ResPartnerBank(models.Model):
             else:
                 super(ResPartnerBank, record)._compute_acc_type()
 
-    @api.depends('acc_number')
-    def _compute_l10n_ch_postal(self):
-        for record in self:
-            if record.acc_type == 'iban':
-                record.l10n_ch_postal = record._retrieve_l10n_ch_postal(record.sanitized_acc_number)
-            else:
-                record.l10n_ch_postal = record.sanitized_acc_number
+    @api.onchange('acc_number')
+    def _onchange_set_l10n_ch_postal(self):
+        if self.acc_type == 'iban':
+            self.l10n_ch_postal = self._retrieve_l10n_ch_postal(self.sanitized_acc_number)
+        else:
+            self.l10n_ch_postal = self.sanitized_acc_number
 
+    @api.model
     def _retrieve_l10n_ch_postal(self, iban):
         """ Reads a swiss postal account number from a an IBAN and returns it as
         a string. Returns None if no valid postal account number was found, or
diff --git a/addons/l10n_ch/views/res_bank_view.xml b/addons/l10n_ch/views/res_bank_view.xml
index cd7e4ae0267..2acae9d76e5 100644
--- a/addons/l10n_ch/views/res_bank_view.xml
+++ b/addons/l10n_ch/views/res_bank_view.xml
@@ -12,5 +12,27 @@
                 </xpath>
             </field>
         </record>
+
+        <record id="isr_partner_bank_form" model="ir.ui.view">
+            <field name="name">l10n_ch.res.partner.bank.form</field>
+            <field name="model">res.partner.bank</field>
+            <field name="inherit_id" ref="base.view_partner_bank_form"/>
+            <field name="arch" type="xml">
+                <xpath expr="//field[@name='acc_number']" position="after">
+                    <field name="l10n_ch_postal"/>
+                </xpath>
+            </field>
+        </record>
+
+        <record id="isr_bank_journal_form" model="ir.ui.view">
+            <field name="name">l10n_ch.bank.journal.form</field>
+            <field name="model">account.journal</field>
+            <field name="inherit_id" ref="account.view_account_bank_journal_form"/>
+            <field name="arch" type="xml">
+                <xpath expr="//field[@name='bank_acc_number']" position="after">
+                    <field name="l10n_ch_postal"/>
+                </xpath>
+            </field>
+        </record>
     </data>
 </odoo>
\ No newline at end of file