multi_store_stock/views/product_view.xml

<?xml version="1.0"?>
<openerp>
    <data>

        <!-- Product Template Form -->
        <record id="view_product_template" model="ir.ui.view">
            <field name="name">product.template.form</field>
            <field name="model">product.template</field>
            <field name="inherit_id" ref="product.product_template_only_form_view"/>
            <field name="arch" type="xml">
                <field name="name" position="after">
                    <field name="store_id" groups="multi_store.group_multi_store" string="Sucursal" placeholder="Sucursal"/>
                </field>                
            </field>
        </record>

        <!-- Product Pricelist Form -->
        <record id="view_product_pricelist" model="ir.ui.view">
            <field name="name">product.pricelist.form</field>
            <field name="model">product.pricelist</field>
            <field name="inherit_id" ref="product.product_pricelist_view"/>
            <field name="arch" type="xml">
                <field name="type" position="after">
                    <field name="store_id" groups="multi_store.group_multi_store" string="Sucursal" placeholder="Sucursal"/>
                </field>                
            </field>
        </record>
        
    </data>
</openerp>