initial version

src/views/customers/_clock_options.njk

@@ -0,0 +1,6 @@
+<option value="">— new clock —</option>
+{% for clock in clocks %}
+<option value="{{ clock.id }}">
+  {{- clock.manufacturer or '' }} {{ clock.model or '' }}{% if clock.description %} ({{ clock.description }}){% endif -%}
+</option>
+{% endfor %}